Now this was something I certainly didn't expect.

“Latency also factors into the equation when using any wireless device, and memories of the PSP’s heavily buffered Remote Play feature have us hoping for a significantly reduced delay between the higher and lower screens. Fortunately, we’re pleased to find that latency here is impossible to pick out without some exacting method of measure. In testing the difference, we find results that completely subvert our expectations here; in instances where gameplay is mirrored between the two, the GamePad screen actually renders the image 116ms before the 50-inch LG screen does.”

Source: http://mynintendonews.com/2012/06/17/wii-u-gamepad-renders-faster-than-the-tv/

I hope during this testing they were inputting the correct format to the TV. HDTVs have long lag times if they have to upscale or convert the picture to their native resolution.

My Wii is unplayable on my HDTV because of the conversion, it's over half a second between controller input and visible response.

It's crazy how much latency that TV has, I knew it was bad on most TVs but that is just bad. I guess they didn't have Game mode on tho. 

As people have said. Most TVs have a game Mode HDMI channel these days. I wonder if this was taken into consideration.

Smart Glass renders faster than your mind, deal with it. The future of gaming, grow a third arm, tune in, turn on & give Bill Gates your money (he's just gonna give it to some poor Indian kid, so it's tax-deducitble).

Wii U GamePads were wired at E3 and its screen is lower resolution than that of the HDTVs.

pretty sure the wire was nothign more than a security cable to prevent people stealing the controller.

"There is the curious issue of why the tablets are wired directly to the kiosks, however, and there's no absolute certainty whether this setup is just for power, or if AV data is flowing to and from the console as well." DIGITAL FOUNDRY.

I'm only saying we must be cautious...

Good to hear. The closer the stream times, the better, obviously!