Not late... EARLY.
We're not done finding ways to increase performance, including software upgrades and streamlining the server. As for now, if you can't notice the speed increase, then I don't know what to say. It's pretty obvious. I honestly don't think it's a software issue, but we'll look into that as well.
Even if people were perfectly happy, we'd STILL look for ways to improve. We don't want to remain stagnant.