I smoke alot of blunts (thats all my main smoking buddy does besides a bong).
He rolled 2 blunts the other day and were lit at the same time and passed around ~6 people. We timed em and they went 32 minutes give or take a minute. But if I am alone, I do *NOT* smoke blunts. I like bowls because they are so much more effecient. And honestly in my opinion, blunts do not get me higher because the tobacco takes the intensity of the high away. People think its weird, but I can get higher with 1/2 as much pot if its smoked in a pipe/bowl.