It's a small sample size so far, but for everyone who has responded, the theory about time perception for early/late people has held. People who are always on time perceive a minute as lasting less than a minute (kudos to John Harwood, who lasted all of 24 seconds. I think this means he attends events before they're even conceived).
What I need now, in addition to more respondents in general, is an additional sample from people who are always late. I doubt that any of you fall into that category, but if you know someone who's always late, please cajole them into testing this. Thanks.