Originally Posted by Absolutely!
Now look at Haye. Enters the ring against Chisora at 210lbs (his in-ring weight at cruiser) and does the business on his larger but far sloppier foe. Look at Huck. Another 210lber who pounds the crap out of Povetkin because he isn't an immobile tub of meat, and hasn't sacrificed his attributes at the altar of mass.
One of the troubles with the modern heavyweight division is that normal sized heavyweights, perhaps out of a misguided belief that it allows them to compete with the naturally larger men, are packing too much weight. For some it's too much muscle, for others too much fat. Either way, they're not in peak condition. Haye showed that a smaller fighter who's fast, athletic and willing to put the work in at the gym can triumph over a heavier, but ultimately less talented, and less well conditioned fighter in Chisora. Chambers showed that a far talented smaller fighter could quite handily beat a much larger foe in Dimitrenko.
Haye and Chambers are/were better because they were far more skilled. Chisora throws Trevor Berbick round, pushed punches. Haye throws sharp, straight, fast, leveraged punches that were getting inside Chisora's attempts. Dimitrenko is just tall and that's it. Chambers was in a different league.
Size does not overcome all...