not that it's terribly important, but lots of people use claymore's miner.
two indications: watching closely the hashrate on flypool(about 40% of total zec hashrate) when the new miner is released  it would look like everyone is using it... also if you calculate the amount claymore made on his devfee zec account (the one posted here earlier) - it's 2.5% of the 10% of the total zec in circulation .. also it could be not the only one...