The sharing of capacity issue in cable comes in the "last mile" - the
coax between the CMTS and the user. The sharing capacity issue in DSL is
at the DSLAM, which is the entry point, and the only entry point to the
"last mile". The effect is the same. The traffic cannot be routed around
the bottleneck to avoid the bottleneck.
There are no "nightly slow-downs" on cable when it is not oversold, but
there are "nightly slow-downs" on DSL ISP's who oversell the capacity on
You can kid yourself all you want, but a bottleneck at the only entry
point to the last mile is no different than a bottleneck on the last
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
See My Christmas Lights: