I recently set my grandparents up with an HP pavilion slimline tower, with the AMD 2.4 Ghz 6400 dual core processor 2 gigs of ram and a 250GB hard drive, that replaced their old gateway they got in 2000.
After setup, I speed tested their internet on speedtest.net, and it came up with 20 ms ping, and a whopping 26 Meg download speed.....
needless to say I was completely shocked not only is that the fastest i have ever seen, but the highest speed comcast offers is 10 meg, and that is only to businesses.
At that speed my grandmas internet is in the top 50 fastest in the world
131,000 mi and counting, GP GTP wheels with Pirelli P-Zero Nero rubber.