Standard DSL is good out to about 20,000 feet (or 6,100 meters for the more cosmopolitan of you)from what they call a 'Central Office', which is usually neither central nor an office, but IS more along the lines of a distribution point for the telco carrier's equipment.
Well, the nearest goddam DSL C.O. is something in the neighborhood of 19,500 feet from my house, which means my DSL was always a miserable rip-off.
Luckily, my employer agreed to pickup the tab for my cable modem service, which, under most circumstances, is less reliable than DSL, but occasionally you might be in a lucky neighborhood where nobody else is using the shared bandwidth, so you might get the better performance that cable modems are capable of. like this:

Much better than the crap like 384kbps I was getting on Verizon DSL, back in the spring, eh?
Still, I've only had this cable service, which I've seen peak at around 15 mbps, over the summer, so Verizon finally gets their act together and start spooling out the high-speed FIOS service! See, I'm happy with my 15 mbps. What do I want 50 mbps for?
(That's rhetorical, btw. I'll eat all they can throw at me!!!)