My downstream sync, as reported by Zen, is 62289 kbps.
My downstream BRAS profile, as reported by Zen, is 60293 kbps.
Most times, when I perform a wget on the 100Mb TBB test file, speeds fluctuate (as you would expect) but never exceed precisely 6.89 MB/s = 57797509 b/s = 57.80 Mb/s.
Indeed, a speed test just now ( http://www.speedtest.net/my-result/3636439021 ) matches this number (57.78).
So, why is this figure of 57.80 significantly lower than the BRAS profile of 60.29 ? Nearly a whole 2.5 Mb/s slower than what I believe it should be? Or is there some other traffic overhead at work which I've missed? (I thought it might be TCP but that does not account to where 2.5 Mb/s of speed has vanished to). Or are Zen applying their own limiting to a few % below the BRAS profile?