There was a 180 second wait period between PMs?? Never knew that as it takes me about that long to formulate a response anyway. Plus I never get that many PMs or e-mails that I'm so overwhelmed that 3 minutes is just too long to have to wait.
Now see, it's taken me over 4 minutes to write this response and proof-read it before hitting "submit"!
And another 30 seconds to add the smilie!