Yeah, i can suggest a couple of things.

First, did you set your speed to "Mac" or "12"?

Second, what connection type do you use to access the net? i.e., cable modem, dsl, or dial up?

Also, think about the people that you are downloading off of, remember that you are downloading off of the entire gnutella network, and you may be downloading from someone with a slow connection.

By the way: What is your definition of "too slow"?