Cable is shared bandwidth, but there is also a LOT more to be shared.
I MUCH prefer cable speed wise-there is NO comparison. In the past, I've had a couple outages with AT&T broadband-now Comcast, but it has been rock solid since I bought a place.
JDJohn, if you can get 1.5mb on whatever the hell DSL you have, I'd stick with it.
I've never heard of 1.5 on a DSL, but I suppose you can get it if you pay out the nose.
If you want to know your bandwidth, check out
www.dslreports.com & use the speed test. Close everything else on your computer & run a couple speed tests...if they are close to consistent, you should have a very accurate reading.