I would say bullet is pretty pointless anyway, but that's just me.
Awful site
Always a good idea to refresh the page if your opponent is taking too long. Could be a temporary disconnection and you didn't get the move. It's alleged that some folks do this deliberately to simulate an ISP problem. I have no idea if that's even possible...
Is there really something like a "disconnect switch"? How can I get one? 
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So fun to play when you're 23.45 seconds up and your opponent down at 0.00 and - oops, suddenly the clock jumps and you lost on time. And this isn't the exception here, it's pretty much the rule. Makes playing here rather pointless.