I released this ("PHP: a survey about date data handling") on Friday, which is a bit of as rubbish day for me to ask for ppl's input as they've generally got better things to think about. Whereas on Monday people might be looking for something to do other than work.
I've got 55 responses, which ain't bad given how anonymous both myself and this blog is in the PHP world, but I wouldn't mind a few more. So if you've got an opinion on PHP timestamps vs DateTime objects, I'd be keen to hear it. Or if you can fwd it on to other people who are in the PHP world, that'd be cool too.
I'll post the analysis tomorrow. Spoiler: there's not much in it.