I agree that bitcoin is not yet ready for primetime mostly because of end user security, but volatility is just a lousy argument.
Y'all: if outsiders believe it is a problem, it IS a problem. It's up to all bitcoin users to advocate and educate, more than it is anyone's responsibility to learn.
I don't think you can seriously accuse PayPal of laziness over this either. They've previously demonstrated that they've done their homework, and that they're enthusiastic and ready to get on board with bitcoin. They also had a lot of success in pioneering internet payments before bitcoin was a twinkle in Satoshi's eye, so I think they have a lot to contribute.