The wireless performance of my 2011 Air is shockingly poor, and I have tried numerous fixes to no avail. I'm now attempting to download the 1.25GBs worth of updates I have via my 20Mb connection. It's reading 2-3 hours on the Software Update download bar. On the iMac, I'd be looking at about 20-30 minutes download time for something of this size, maybe less. This really is a very frustrating situation, as the computer itself is otherwise excellent. But I'm literally 2.5 metres away from my router and I find myself getting less than half the connection speed of the iMac at the same distance. Has anyone here updated to 10.7.2 on the Air and noticed improved performance of their wireless connection speed?