For 5000 songs, 3-5 seconds per song = 15000 - 25000 seconds, or 4h10m to 6 h56m. Not 250 hours. That would be if it took 3 minutes per song.
Though yes, if you use FW800, it should take considerably less time.
Ahh yes, skipped the conversion to seconds instead of minutes. Good call. 1 too many Belgian beers to celebrate my new iMac tonight. 9% beer creeps up on ya fast.