It depends on how you define "a bit". The last time I paid any attention to this the toolbar PR was updated every 3 months or so and those updates were already

It depends on how you define "a bit". The last time I paid any attention to this the toolbar PR was updated every 3 months or so and those updates were already outdated. I can't remember how outdated the updates were or even if google told you that. I suspect they didn't. Google has also taken to using the toolbar PR as a way of communicating its displeasure over certain practices. Paid links is a recent example. All told your PR is irrelevant as you say. Especially in comparison to your actual rankings which are also largely irrelevant to tracking what's driving traffic to your site which is itself largely irrelevant to tracking conversions, registrations, return visit or whatever other metric most makes sense to your site/business.