I've the option of 100Mb net here, which is pretty good going as the catchment area for 100 miles around here must be about 100K people.
I'm more in the habit of developing on a server rather than locally, I don't have much of a need for huge upload/download speeds. The small drawback is that I save my work often so there's a few seconds delay between clicking save & it actually being saved.
If I wasn't working alone at home or family were hogging bandwidth I'd see a use for the extra B/W.
Still, it must be nice to have 100Mb on tap
