I tested these out last night, as did some of my guildmates. Unparking the CPU does offer some performance improvement, but it seems to vary a lot depending on your system and where your bottleneck is. For me, I only gained 0.5 FPS on the benchmark. However, some of my guildmates saw bigger gains.

As for the "aero mode", I feel like wolfman was a little confused/confusing in his explanation. He's actually turning aero off, not on. On my system, this had absolutely no impact on framerates at all. (Actually my benchmark score dropped by a few points when I turned aero off, but not even a tenth of a frame's worth.)

I'm going to try f.lux this weekend.