I suspect it's the same problems that have been going on for years. This place has always had random short duration slowdowns. They got a lot worse (and then nearly everyone noticed them) back around the time the board got too big for the backups, and then again when the indexes got too big and the database ground to a near-halt. ToB fixed the last two but I don't believe he ever found a cause to the random slowdown issues. I still see them randomly, I just come back 10 minutes or so later and they have usually stopped.