If memory serves, it usually doesn't, 2.6 is the ideal speed for a BM weapon. With Serpents swiftness and no other haste, it should give you the perfect 1.8 attack speed. If you are running with minimal latency and a good macro you should be able to keep up a 1:1 ratio and do good damage. Combine that with the nice stats and you have a winning choice.
*Disclaimer* 2.6 may be too fast. let me double check.
**Edit** This is actually one of the ideal BM weapons pre-kara, Thanks Aethien.
Edited, May 20th 2008 12:33am by rinkkel