Well, I highly dispute that there are "a few hundred ASICs" mining bitcoins. Aside from the farms (which there are), I would venture there are at least 10,000+ ASICs out there in people's homes. No, they aren't cheap, and the mining race is too hot right now to keep up, but those units are still there. And at current prices, they easily pay for the electricity they use.
I also dispute what you say about the level of "decentralized" - one may be more widespread than the other, but both are decentralized. It's like being dead, or pregnant. You either are, or you aren't.
Now, if you include the way that CPU (and GPU) mining is open to botnets taking over, then sure - there is a much larger number of machines there. Quark has that going for it in spades.
A few hundred or a few thousand ASICs, I am not sure about exact numbers, but what I said still applies.
10 000 ASICs (sha-256) vs 100 000-1 000 000 graphic cards (scrypt) vs millions of CPUs (quarkcoin).
It's pretty obvious who is more distributed.
At least they all can compare, and from this perspective I wouldn't say Quark has no chance to compete with the juggernauts. Some would argue that even Litecoin has no chance against Bitcoin.