would gavin had created bitcoinXT had he known <1% of miners would support it, while >60% support BIP100. i don't think he would of wasted his time.
Gavin didn't create Bitcoin XT, he created BIP 101 and merged it to Bitcoin XT, which is Mike Hearns much earlier fork of Bitcoin Core. Miners show their support for BIP 100 for obivious reasons (it gives them more power), but we will see if it will be actually coded and if new fork will be created to implement it.
Also it's currently not possible to vote for BIP 101 as slush voting port got DDoS:ed and they disabled mining with it. In addition all Bitcoin XT nodes have been under constant UDP flood attacks and many have been forced to shut down. I'd say that statistics are meaningless with this level of censorship.
maybe he would of changed his mind and created a new BIP, but that's too late now, poor gavin cast away, forever?
I think that BIP 101 is a very reasonable proposition:
http://imgur.com/b5eOEafIt makes Blocksize limit growth predictable and if in distant future it errs to the upside it's always easier to soft fork to smaller value, than hard fork to increase, which would be must with BIP 100 and it's 32 MB final limit.
let's pretend the dev team had put all the block limit BIPs up for voting at the very beginning, and right away they saw BIP101 with <1% hashing power without any funny censorship happening... would gavin have continued to push BIP101 as hard as he did?
your individual opinion on BIP101 VS other BIP's is good to know, but knowing EVERYONE's opinion put together is more valuable info.
miners favor a BIP that give's them more power sure thats fine, thats why we need BTC votes to weigh in and paint a more accurate picture for the dev's to consider.
bottom line is its hard to argue devs wouldn't benefit from having this kind of information on hand.
also, i'm starting to think everyone should be allowed to "vote" for more than one BIP, they aren't voting so much as expressing their willingness to embrace a change, so if a miner is willing to accept BIP100 OR BIP101 he should be able to express that. maybe the voting could be 2 parts, first part miners express whether or not they think each BIP is acceptable or not. second part they Vote for their favorite one. this would give us alot of valuable info. miners can easily put all this info in the CoinBase of the blocks they mine, "BIP100-OK BIP101-OK BIP123-NOTOK, BIP100-FAV", BTC voters can write out the same kind of msg and sign it. then we can chart all this data and get information out of it.