Fun experiment and poll: When do you experience lag in UI response?

Ajaxian posts today about Craftsmanship and UI Latency and links to a fun little experiment where you can click to see the difference a few milliseconds make in responding to a click.  I thought it might be fun for readers of the FBS Blog to try it out and then mark their responses in the poll below.  So, just click this link, run the test, and then return here to enter your vote in the poll.

When do you experience lag in response?(polls)