For an Anandtech review I'm surprised it was so bad. No wonder they're asking for new writers to cover areas like this. Not only does the reviewer try to measure the input lag against other LCD's (something which, due to the variable nature of measuring LCD lag, is never such a good idea) he also shows he doesn't have a full grasp on things like wide gamut issues, and doesn't even know what to look for when people talk about the anti-glare coating etc.
His lag measurements are against an HP LP3065. So when he says that the U2711, in Game Mode, has a lag which is 17ms he means 17ms above the LP3065. IE The real lag is 17ms + the LP3065's lag time. If you could find someone who has a CRT to measure the LP3065 against, and knows how to measure properly, you might actually get some idea. Based on the other LCD's of that size/generation it's probably somewhere around 8ms, so the likely input lag on the U2711 would be more like 25ms, or a 1 and a half frame average. That compares with 2/3rds of a frame (11-12ms) average on the U2410.
Given this, whilst the U2711 isn't as bad as the previous generation of Dells, if the average really is as high as a frame and a half @ 60Hz then I think people would be rather charitable if they said it was good for gaming. It's probably not bad enough to notice anything, so it'd be good enough for local/casual gaming. But a frame and a half is a decent sized handicap if you're talking about being competitive in fast FPS'ers online.
As said by some others, I'd also be worried about LG's quality control on these screens. But the real question is, at such a high price, you'd have to wonder if many wouldn't just rather stretch the extra mile for a 30 inch..
. They said the 27" has more input lag then 30" LCD's without scalars.
