No, thats expectation based on expected Switch hardware, power of Pascal based Tegra, ARM A57 CPU and 4GB of RAM.

Nvidia about Switch stated: "NVIDIA GPU based on the same architecture as the world’s top-performing GeForce gaming graphics cards".

Actually few industry experts (WSJ wrote their opinons about Switch hardware) also said that they expecting that Switch be Pascal based, Tegra Pascal is around 500-600 GFLOPS when it's not too clocked, so that's roughly around 3x stronger than Wii U power.

So yes, we can expect that Switch will around 3x more powerful than Wii U.

If you're talking about Takashi Mochizuki, he only said it was likely the GPU was Pascal based, but even if he's correct, it does not necessarily follow that its performance matches that of a stock Tegra Pascal; nvidia have already confirmed it is a custom design, and we don't know in what ways it has been modified.

I don't expect it to be fully 3x better than a Wii U.

I think it won't be full clocked for one, secondly I think there is more to graphics/hardware performance than just flops.

Wii U being able to run at a full 33 watts with a giant ass brick of a power supply will give it some advantages over a Switch that runs at maybe 20 watts tops, and that's docked and everything, in portable mode it's probably 1/3 that.

Which brings me to another thing -- I don't think Nintendo wants huge performance differences between docked and undocked modes. Some improvement, possibly yes, but like huge differences .... IMO, no.

Nintendo may well gimp the chipset a bit or go with one a bit cheaper/stripped down because they feel they don't need the highest performance.

The GPU can only run at a max 6-7 watts, that puts a big low roof on performance. I think one of the main things Nintendo wants to emphasize here is that you can play the same go whether at home or on the go, not one build of a game, and then something is very noticably worse on the go. 

Again, Pascal based Switch would gave us around 3x stronger performance than Wii U. Custom yes, maybe it will be upgraded or downgraded Tegra stock, we don't really know that, but with infos we have we can expect around 3x more power than Wii U, maybe something weaker or something stronger but around 3x.

As Soundwave posted above, Switch does face significant barriers to achieving that kind of power in real world performance. It's fine for you to expect that, but I don't think it's accurate to talk as if that's what most people expect.

It can be easily be fully closed in dock mode, have on mind that Pascal will alow higher clocks with less power consumption and heat.

Offcourse that its not only about graphic power, but quad ARM A57 is much more capable than Wii U PPC CPU, and it seems that Switch will have around 3GB Ram for games.

Comparing power consumption of Wii U with Switch doesn't make any sense, Wii U is very old tech with 45nm while Switch is most likely latest Nvidia tech with 16nm.

I agree they don't want huge difference in handheld and docked mode, because that would complicate development too much, most likely they will aim 720p in handheld mode and 1080p in docked mode for their games. So difference most likly would only be resolution.

I gave answer to Soundware post. Of Course I can talk what people can expect.

I'm not understand your logic .... How you want portages with 500 or 600 Gflops ... We can not have the 1080p with so little ... Nintendo seems yet to come gamers (classic pad, e-sport) ... Why try to entice the gamer on one side if it is to still provide a machine that will not be upgraded...
It's like trying to race on one leg ... After the slap they took with the WiiU, Nintendo can not ignore the power ... It is giving the stick to be beaten ... . If the machine has 2 or 3 times the power of the Nintendo WiiU ... would have had every interest in saying that the switch is a portable ... not a home console...

You're talking about what you expect. But you don't speak for everyone.

And you're still using unproven specs as if they are confirmed. A quad core ARM A57 CPU is not proven. 3GB of RAM for games is not proven. Stop talking as though they are.

Its not just my expectation, that similars expectation of plenty of people who are actually aware about very possible Switch hardware.

Nothing is proven expect that Nvidia is doing chip (but Nivida did said "NVIDIA GPU based on the same architecture as the world’s top-performing GeForce gaming graphics cards") we talk about what we can expect and most likely scenario with infos we have, same like we talk what we can expect and what's most likely scenario for Switch concept.