Nope it's all the same, i dunno how it works actually LOL but most will work. The difference is some isp's throttle certain ports, most isp's cannot throttle because it's for browsing and SSL servers run on port 80. So in theory it should run full speed, at least that is what i think but i could be horribly wrong

. Astraweb i always had issues with. Slow download, low retention but since i got newsdemon it has always run full speed and i am sure it's because i use the ssl servers. As far as i know astraweb doesn't have true ssl servers. Plus newsdemon gives you 30gb storage space, so i have uploaded all my work files and important info just in case all my other back ups fail, nothing major but it's a nice to have.
I love dslheaven, it works for both nzb and torrents. Kuk for gaming though.