In reply to natetan:
Athletic is used when referring to those sports, or components of sports, in which physical, strength and/or endurance is a major determinant of success. As such pretty much anyone who trains to enter a running race is doing something athletic and therefore may be considered an athlete (albeit often not a high performing one!) By contrast some other top sportspeople (maybe golfers, snooker players or showjumpers) could be at the top of their sport but not be considered athletes because athleticism doesn't constitute a critical part of their sport.
Climbing covers a wide range of the scale depending on the approach taken by the individual. It's often said that Pete Livesey was the first climber to use structured physical training to enable him to climb harder, which may give an indication of what kind of grades (E4 or so) are possible without taking an athletic approach to climbing, but in fairness that only applies to naturally high performers. If a climber is plateaued at HVS and undertakes a physical training programme to break into E1 then what they're doing is improving athletic performance and they could rightfully describe themselves as athletes if they chose to.
ps. There are many climbers seemingly in denial about how similar climbing is, at even quite modest levels, to other athletic sports, preferring to see it only as a lifestyle choice or a risk-based activity but without acknowledging the huge part athleticism has to play in climbing performance. It's all of the above, of course, in different proportions to different climbers, but to deny climbing is athletic at all is very odd.