You know, now that you put it that way, I wonder if it's a SB-influenced thing?--yes, like the split fins and BP/W things. From the frequency with which DIN regs get mentioned on SB, one might get the impression that every "serious" diver is using them instead of yoke. In reality, DIN regs get mentioned so much on SB because the number of cave and tech divers here is out of proportion to divers in general. Also, we have some members in European countries where DIN is, well, standard. To those of us hanging out on SB it may seem hard to believe, but there are probably loads of American divers who would say they can't recall seeing anything other than a yoke reg.