The people who rate things in the WINE AppDB have no standards. It seems to me that if you can get an application to launch that gets it Gold status, if you can get it to do anything after it launches, that's Platinum. Pardon me for being picky, but if it doesn't run just as well as it does under Windows, that's not a great accomplishment, and certainly not deserving of the highest rating available.
Some Steam Game
Works perfectly, but only if you disable the Steam Overlay: Platinum.
What Works: Installing (with a laundry list of tricks and hacks, see notes).
What Does Not: Moving your character, interacting with the game world or game interface, chat.
Yes, great. Platinum indeed. Just check the Top 10 Platinum list and really look at how broken the best running things are.
If I ever completely give up on gaming, or if developers pull their heads out of their ass, I'll be rid of Windows.
Development, file management, general usability, I'd take GNU/Linux any day. But I still want to play StarCraft II, Diablo III, Borderlands, etc. and it's just not happening under WINE.