I mow lawns at 7:30 in the morning and it usually won't clump. I don't do the lawns that are like 8 inches tall, but I will cut off a decent amount. I love the BBC on my mower! And yeah the grass falls off the deck when I stop the blades on mine, too, if it's wet. That's good experience with the VersaMow on half-bag, half-mulch...the manual mentions that, but I never did it.