No, actually the port is a different shape than the standard mini usb ports. They are that shape to support the adapters and the headphones that HTC supplies with the phone. I believe the internal pins are as usual on a mini usb for charging and the outside are used as extra connections for things like the headset compatibility.
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Compaq H3650 --> Handspring 600 (Sprint) --> HTC 6600 (Sprint) --> Dell Axim X51v --> HTC Mogul (Sprint) --> HTC Touch (Sprint) --> HTC Diamond (Sprint) --> HTC Touch Pro (Sprint) --> Palm Pre (Sprint) --> HTC Touch Pro 2 (Sprint)
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