silentstriker
The Wheel is Forever
I understand your point, but I think there is a lot to be said for sustained excellence. Sustained excellence means you performed in many countries over a long period of time. It also minimizes bad or good luck that you may have had over a series or two, and it shows how you adapted after other players made adjusted to you. It also tells how you performed after playing in varied conditions, instead of having a couple series in a row where you may have only played on helpful pitches, or with weakened lineups, or something like that. So while I think a peak tells us a lot, sustained excellence really tells us a lot more.I would say, at his peak, Imran was the greater bowler but Wasim was a world class bowler for longer time.
For all sportsmen, particularly fast bowlers in cricket, we should assess their greatness when at their peak because how long that peak lasts is not necessarily a measure of their skills/caliber/genius etc.
Fast bowlers, of all cricketers, are most like field athletes and we do not take out the average speeds of the great sprinters of the world over all the races they ran in their careers.
PS: I know this(the comparison with a sprinter) is an imperfect comparison so please lets not deviate into this. I am just trying to make a point with the closest parallel from another sport I can immediately think of - nothing more.