Quicker != better
I'm a long-term Firefox/bird/phoenix user but I'd like to query the assumption that a quicker fix is a better fix.
QA and testing cycles take time for a reason, and if they're compressed for political or publicity reasons you can end up with corners being cut and loose ends being left untied.
Result - hoorah the latest FF is out a few days early, and then in two weeks time another flaw is discovered that might have been picked up in the current cycle, and another version is rushed out to patch that.
I'm a developer, not in QA, by the way, and I hate having my stuff QAed as much as anyone else does; but I'd rather the schedule was stuck to than the release rushed out to score a minor brownie point in the week that IE8 lumbers into view.