I disagree. One of the issues I have with many Mobile Suit designs is that despite their huge size, they actually have extremely limited armament and often limited mobility as well, especially the early U.C. era MS.
Take the RX-78 for example, it can't fly, only walk, run and jump, so has to have a mother ship or other transport vehicle to transport it from location to location, unlike Valks, which with their high Mach speeds have far more useful stategic mobility. Not to mention far better manuverability.
Many MS, the RX-78 included also carry a tiny weapon load for their size. Head Vulcans with limted ammo, a beam rifle with limited ammo that usually has to be discarded after 20 shots or less and no spare ammo! beam sabers that are only useful if the enemy gets within range.
While I'm not going to get into a Valk vs MS discussion, I'd take any VF over any pre-Victory (UC153) era MS anytime. Valks generally have the upper hand in armament, speed and manuverabilty. Valk armor and pin point barriers on later VFs is nothing to sneeze at either.
Not even going to get into the whole G-Gundam, Wing Gundam, SEED/SEED Destiny thing as they are more super robots than real robots IMO.
Graham