said by tmc8080 
:said by a333 :DOSCIS 2 shares the 50 megs among like 50 users, so comcast cant use it to offer those speeds to each and every sub. Now, hopefully, with channel bonding and the rest of it, DOSCIS 3.0 should be able to make those speeds possible.
Actually the node shares a few hundred megabits (100-400 depending upon how many subscribers per node (24-50), which could be *split* to accommodate the greater speeds.
Actually Comcast themselves say their average node size is over 450 homes passed and they certainly don't have several downstreams. You can have a vague guess by the different downstream frequencies seen on plant of the same origin but it's certainly not going to be the 10 needed to get close to 400Mbit to a single node.
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