I thought we had been doing this, but toward the end of last week I really started watching the clock and started putting LO down for naps at about the 1.5 hour mark - Iswaddle, rock and shush to get him to the drowsy but barely awake point although sometimes he falls asleep on our way to put him down!), so by the 2 hour mark, he's usually asleep.
He has been doing pretty well on it. Usually he will only nap for about 45 minutes to an hour, but we got a 2.5 hour nap on Saturday, and yesterday we got him to nap in his crib for the very first time ever (he sleeps in a rock n play and usually aps in the swing or pack and play napper attachment). I think it's helping his temperament a little bit and it hasn't hurt his night sleep at all (although it hasn't helped it).
DH is not on board with this yet and tends to overstimulate him, but once he's home alone with him for full days, I think he'll learn to do it.