I see. I think maybe what we're seeing here is a discrepancy between folks who are used to seeing/playing elf fighter/wizards (or something similar) from AD&D, when, at average party level 15th, the Ftr/Wiz was about 13th/12th or maybe even 14th/12th or so. I'd say most who played back then might agree that multiclass demihuman fighter/spellcaster mixes were the way to go, hands down. I can't remember anyone ever playing a straight fighter at upper levels, and nobody wanted the wizard below 5th, either.
Anyway, my point is this: those old-time multiclass mixes were a little too strong at times, since they overshadowed the straight classes most of the time (except a high-level straight wizard in AD&D, which ruled the roost, IMO). Now, I'm seeing the opposite problem: multiclass Ftr/Wiz types are severely limited in effectiveness, to the point where nobody I know is willing to play one. This problem is nearly fixed, I'd say, with the advent of the mystic theurge and the eldritch knight (the solution isn't perfect, granted, but it is a decent one).
I guess I'm really just trying to identify people's biases, and to throw a little light (maybe?) on the subject. In 3E, in my most recent experience, the 18th-level wizard and the 18th-level fighter both easily outshone the Ftr8/Sor10 and the Bbn7/Clr3/hunter of the dead 8, to the extent that the multiclass characters' players were ready to quit the campaign out of boredom and frustration. We just had to roll up new characters and start from scratch, and I can assure you that I will be advocating, if not forcing the issue of the gnome Ftr/Ill taking levels in spellsword and/or eldritch knight when he is high enough level, so he can compete fairly (and "funly") with the others...
Edit: Spelling.