He wasn't being a jerk or boastful. I could do 5 AAs in 2-3 hours solo at level 57... shit, 5 AAs could easily be done in Eld's in 3 hours with any competent group.
If he wanted to be boastful, he'd say 1.5 hours. In FR, HHK, The Rust, etc, you can make an AA every 20 minutes with a well geared...