But whole Tegra thing is latest tech (espacily Pascal based) that Nintendo usualy dont do, and Nintendo didn't had that from GC. Thats point, they going with different strategy compared to last two gens, they going with very modern tech/architecture, just not with strong power thats on pair with PS4. And going with Pascal based has much more sense than going with Maxwell based because of battery life of Switch, also Nvidia did said "The high-efficiency scalable process includes an NVIDIA GPU based on the same architecture as the world’s top-performing GeForce gaming graphics cards". And Nintendo do pay attentions of memory performance compared to rest of hardware.

Yes, but like I wrote, realible sources (same like few industry experts that WSJ mentioned) said that Switch is Pascal based, and Pascal Tegra has 50/GB/s. Realible sources also said that rumoured dev kit is close to real, but not 100% accurate. Maybe Pascal based kits werent ready so they used Maxxwel based instead or something, remember Eurogamer reported that dev kits had very laudable active cooling. Nintendo is not competing with XB1/PS4 only with power, but they will have very modern tech/architecture (actualy more modern than XB1/PS4) that they will be using in next hardwares too. Of Course they still want to offer something different than competition but they are aware that Wii U architecture/tech is very outdated and they want very modern tech/architecture that will much easier to work with now and in future.

We shall see how it turns out. Any nvidia chipset could be described as same architecture as world's top performing geforce gaming graphics cards. Nvidia have clearly stated a custom Tegra chip so Nintendo have selected the features they want based on price.  

What I'm expecting;

4GB memory

4 Arm A57 64 bit cores

dual channel DDR3 or single channel 64bit DDR4 of 25.6GB/s bandwidth memory to match dev kit

GPU performance while docked of somewhere around 400-600 gflops

In portable mode probably 200-300 gflops

To be honest I can see it going above or below this. It my middle position for the moment.

Very happy to be completely wrong though and Nintendo to have gone as high as possible with the spec but I just can't see that at all. It will be costed down to the sweet spot of the lowest possible price that offers reasonable performance. In a hybrid system that isn't necessary a bad thing if it makes the portable side have better battery runtime.