RE: Well, yes and no...
Wow. I feel slow! I could sustain an eight minute mile for MAYBE one mile, maybe not even. But for a steady state, 25 minute run, say, I can do a 10 minute mile, tops.
On the topic of Imax vs running, I think they are apples and oranges unless you are talking running intervals, and even then, Imax works my legs harder than running does, whereas after a long run (for me, 60 minutes) my whole body feels more tired than after an Imax session.
Christine