As with averages, there are highs. And there are lows. On the lower spectrum, Mustafa Mohamed, who was not shy on flat 3.000m races, ran the steeple only six seconds slower than his best over 3.000m (8.05,75 to 7.59,34). Jager may be the exception on the high end. Maybe not.
EPelle - Mustafa did have a 7:54:05 indoors in 2009 behind Koech(running a 3kSC best of 8:18:44 outdoors that season) so the low for him might not quite be so low but your point is well made.
Mustafa must be the slowest sub 8:10 steeplechaser ever ....as EPelle points out, he was not shy about running on the flat (often in fast races) but he never looked faster than 3:44, 7:54, 13:30.
It's not as if Mustafa's 8:05:75 PB was achieved down the field in the DL, it was achieved by him winning against a very good field!
Re Evan Jager, he is improving on the flat, his technique at the barriers gets better with each race and I would be very surprised if he does not go sub-8 in the right race by the end of next season barring injuries.
I think Evan will go through a further extended period of running fast and finishing 3 or 4 behind the Kenyans and it will be really interesting to see if he can break the Kenyan stranglehold over the next few years.