MacBook Pro: long time to wake from sleep, what could it be? I have a 2011 13-inch entry-level MacBook Pro, which was upgraded almost straight away to Lion.

I consider myself a careful, conscientious user, not installing things I don't need. However, recently, my MacBook Pro has started taking a very long time to wake from sleep.

I understand that it takes a long time to go to sleep, around 15-25 seconds usually. However, before, waking up was almost always instantaneous.

I'd like to know if there are any terminal or gui-based tools that help diagnose this problem. I recently checked pmset -g assertions and that seems to be fine. Any other tools I can use?
Updating my own question: it was a software issue after all. Avatron's Air Display server software installs a helper daemon that slows down the waking of my MacBook Pro. 

After uninstalling it, the Mac wakes up a lot more quickly.