Just my own anecdotal experience... office @ damansara uptown area, using dynamic IP also, gets a 115.x (or was that 118.x, I forgot), and never gets 60.x. Connection like shiat.

At home (Shah Alam area) I almost always get 60.x, and it's way better. Opposite from most people right? Slow at home but fast at office? Haha. It's bad for work though, so slow and laggy and crap, very hard to do work because opening email takes minutes just to wait for inbox to appear, ugh.