Blackberry Time?

I just noticed that the time on my Storm was off by about 4 minutes. I dug around and found that in Options -> Date/Time you can set the time source to be either "Blackberry" or "Network". I want to sync with the towers, but I know that the blackberry (as with most PDAs) cannot sync timezones, so I went digging for more info.

I ran across this. Interesting.