Just spoke to Comcast, apparently, only during the off-peak hours does the "Powerboost" apply.
They said, the 8MB package will go up to 16MB (Which I havent seen yet)
-BUT- It only applies to the first 10 megs of the file.. WTF!!
I do notice when I try to download Vista ISO from Microsoft I get around 3329 kB/s which is great, but it only goes at 3.3 MBps for about 10-15 seconds, then drops back to approx 1.4-1.7 MBps
http://download.windowsvista.com/dl/preview/beta2/en/x86/iso/vista_5384.4.060518-1455_winmain_beta2_x86fre_client-LB2CFRE_EN_DVD.iso
As far as Usenet goes, Giganews, I get around hte same 1.4 - 1.7 MBps
Anyone in Arlington VA see this so claimed Powerboost 16MB ??