We also have these images to suggest that WiiU is capable. These are downsampled to 720p so it might have been from a 1080p source
http://www.abload.de/img/sewers_tentaclesi8ec2.jpgmg]
[img]http://www.abload.de/img/sewers_warrioryucbd.jpg[img]
[img]http://www.abload.de/img/swamp_thiefg7ctc.jpg[mg]
[img]http://www.abload.de/img/swamp_thief2iwiqt.jpg[img]
[img]http://www.abload.de/img/icecastle_wizard00ew4.jpg[img]
[img]http://www.abload.de/img/lava_thief5ycdu.jpg[img]
[img]http://www.abload.de/img/mainmenu_thiefhfdjk.jpg[mg]
[img]http://www.abload.de/img/mountains_warrior9lebq.jpg[img]
[img]http://www.abload.de/img/mushroomcave_coop07d08.jpg[img]
[img]http://www.abload.de/img/ruins_goblinking4gdec.jpg[img]
[img]http://www.abload.de/img/ruins_warrioraiig2.jpg[img]
[img]http://www.abload.de/img/sewers_coopamf10.jpg[img]
[/QUOTE]
Those are the same PR screens that were used for the pc version. You can see them on it's Steam page, unlikely representative of the Wii U version.
[quote="z0m3le, post: 38590765"]Nintendo has their own GPU team, so yeah, it's likely highly custom, there could even still be fixed functionality on the chip. We will have to wait and see. Not expecting the world though, Trinity is a 386 shader unit at 680mhz (?) about 500Gflops to work with. (roughly twice 360)[/QUOTE]
The customation is probably limited to DX11 features and onboard eDRAM. We haven't seen anything from games suggesting otherwise.