The servers slowed but didn’t crash in Tokyo Tuesday as customers queued up for hours For reasons that aren’t immediately clear, Japan didn’t suffer the nationwide meltdowns that brought Apple’s (AAPL) and AT&T’s (T) servers to their knees Tuesday, the first day of pre-orders for the iPhone 4 that goes on sale June 24. There were glitches that slowed the computers at SoftBank, Apple’s exclusive ca