How do fixes/improvements to video drivers get rolled out in Squeeze?

[Mark <mamarcac@gmail.com>]

Hi,

The Intel 855GM chipset performance has unfortunately taken a step or two backwards from Lenny to Squeeze based on my experience and what I've read in the bug reports and various forums.  Specifically, on-line video streaming becomes choppy after 3-4 minutes on the same websites that Lenny had no trouble with.  That being said, how does performance get improved within a given stable release?  Can I hope for an update to help improve it at some point within the life of Squeeze?

Thank you.