trinorthlighting - 12:25 am on Sep 21, 2010 (gmt 0)
I would not rule it out. Google has a speed standard, think of it this way, what if Google is sending you 6 servers worth of traffic?
I think the easiest test to see if that is the case is to increase your server speed by 25% and see if you see a drop in throttling by a % as well.
You know how Google is pushing speed now days.