Did a check of task manager tonight:

Shutting down the game took ~45 seconds (30 seconds once the exit screen actually came up.)

Took me awhile to get into task manager, so I don't know what the memory usage was before...but by the time I got in it was *down* to 277 MB...so it was well over 300 MB when things got really choppy in the game. Took 4 minutes solid of it hitting the disk before it cleared.

This one was moderate, I've had worse.