It is very much affecting them. The original numbers on the STB were just estimates. And, because the 1%ers had it first (and most), the numbers went up once this update happened (based on the hard numbers established by the purples since the original estimate).
As more and more of the 99%ers get the tank and begin to pull down the averages, the expected stats for the STB will also begin to fall in subsequent updates.
Much to the chagrin of the purples, WN8 wasn't designed to measure purples against purples. It was designed as a basic OVERALL SNAPSHOT for the masses. To that end, it does what it was designed to do.