A store can claim to "QT" all they want but what does that mean? Does the clock reset every time a weekly fish order comes in, or do they keep a half dozen seperate QT systems?
If the market would support it ($$) then LFSs could find the space and staff to do it right. The question is; Are you ready to pay the $75 for a green chromis, or $175 for a yellow tang? If the answer is no, then the market (you) won't support a real, effective QT process on the supply end. Supply and demand, everyone would happily pay normal retail for properly QT'd fish, but virtally no one would be willing to pay the price that would actually need to be charged.