I'd have to say that those seem conservative.

You missed
Person without air lives only 3 min.

I think that a truely fit individual with office clothes in inclimate weather could probably get by for a day by moving a lot but put that same individual in <40 degree F water and you might not make 1 hour. The naked individual in a 40 degree F downpour would fare worse than the naked individual in 30 degree F snow storm.

As with any generalizations, these are bound to be overly simplified and usefull only as guidelines for prioritizing your needs. I wouldn't want anyone to be setting their watches by them.