And can anybody confirm whether they got Tahiti support into this driver?
Yeah, it supports Tahiti cards. So far, so good, I have it stable with Debian wheezy, stock 3.2 kernel, but 3D performance is as miserable as you'd expect with that old kernel; I'll try with jessie and 3.14 and install TW2 tomorrow.
Update: Zero problems installing and a few minor glitches running with Ubuntu 14.04 LTS (3.13 kernel).
AMD FX-8120 (yuck), 970 chipset, 16GB RAM, AMD HD 7750 1GB
Game decided it wanted to run 1280x720 on a 1280x1024 monitor.
Hesitations on point-of-view changes, background textures sometimes delayed in loading.
None of the mouse lag that has plagued some players.
I'll post timings later.
The driver did not like Debian jessie and 3.14. DKMS refuses to build the driver, and it comes up without OpenGL functionality. I don't have time right now to look into why.