Surely it depends on the venue, every record has to be introduced to the punters at some point and taking the risk of clearing the floor first time is surely an acceptable risk to get a record out there, a good DJ will get it back and maybe quieten the floor later with another risk (I suspect the sort of venues DJ's playing such new stuff will have enough people willing to dance to never quite empty the floor), that to me is a great DJ rather than a mediocre one, of which there seem to be 5,999,998 out there (mediocre not great!)
Also some venues don't have such an issue with the odd floor clearer, would suggest there are enough of these much feared and loathed chinstrokers out there that will dance next time, or maybe the next time!!