What happened to disk performance in 2.6.39

I've just run a test and my SSD can read at full speed. I'm running 3.2.2 so I guess the fix is already included in at least one stable release?

Also, it is interesting that it took so long to discover this problem. Does that mean that people don't really care about speed of sequential file access? :) [Well, I know that I do care more about random access performance, that's why I bought the SSD in the first place. And I also know that sequential read performance used to be a major selling point for manufacturers of drives with horrendous random access performance.]