reply to BHNtechXpert
Re: Comcast Loves Packet Manipulation Comcast's implementation is a "leaky token bucket" shaper, which is over all flows on the user. Since the burst capacity is generally around ~20 MB of data, this should be gone after 10-15 seconds at the data rates we are talking about, so at least for Comcast the measurements are highly likely to exclude powerboost effects.
Additionally, this is data which, IIRC, is or will be made available, including packet traces, through Mlabs. If so, you can validate for yourself that the sustained data rate has dropped down, excluding the burst effects.
And this may make consistent datarate apps unhappy (OTOH, constant datarate apps need to adapt anyway because of cross-traffic), but it makes bursty-interactive apps, like web surfing, very happy.