Forty minutes twice a week is more than enough time if you're doing it right. If you can lift two days in a row in perfect comfort you're doing it wrong.

Actually it's exceedingly simple: You don't work the same muscle groups more than every 2-3 days. Your argument suggests that if I do legs in the morning I shouldn't be able to do bi/tri that evening for example, which is pretty asinine.

We are talking about two different things. I was power lifting which involves different workouts than total-body or body-weight exercises, for example. For the most part, though, the morning was reserved for cardio and very little lifting, mainly just some body-weight exercises.

40 minutes twice a week isn't nearly enough unless you're not looking for very good gains.