IIRC I read that for an outside observer everything that is sucked into a black hole does never actually pass "into" it. The closer it gets to the event horizon, the slower it's clock runs (from an outside perspective), and gradually stops upon approaching the horizon itself. [!] That seems like a rather large difference.

[!] Disclaimer: I don't know if that interpretation is still considered valid.

Edit: Formatting

I read recently, I've forgotten where, that the cumulative time difference for the center of the earth (relative to the surface) is about four minutes.