That would depend on the specific pin broken and the functionality it provides. If it's a power pin it might slow down the charging of an on-board capacitance but I wouldn't think it would be noticeable - in the range of milli-seconds at the most. It might be more noticeable if the BIOS somehow detects it and does some extra diagnostics but that would be deep in the BIOS initialization code.
If it were a data pin of some sort I doubt it would boot at all. You'd probably just get a beep code from the BIOS.
Of course you could time it and then buy another one of exactly the same kind and time it again with the pin in place to determine the difference.
That would depend on the specific pin broken and the functionality it provides. If it's a power pin it might slow down the charging of an on-board capacitance but I wouldn't think it would be noticeable - in the range of milli-seconds at the most. It might be more noticeable if the BIOS somehow detects it and does some extra diagnostics but that would be deep in the BIOS initialization code.
If it were a data pin of some sort I doubt it would boot at all. You'd probably just get a beep code from the BIOS.
Of course you could time it and then buy another one of exactly the same kind and time it again with the pin in place to determine the difference.