From cold start to fully avail desktop and no start-up items, Leopard (10.5.1) takes 55" to boot. (see my specs in my signature). That's as much as XP Pro SP2 on a slower configured Vaio I have. The only I thing I see is that I have customized the Time area to display, date + time and that seems to take an extra 2". BUt I had this customization on my previous Mac as well and Tiger didn't seem to kind-of-stop on it for 2". It seems to me that this is also longer than Tiger 10.4.10 (before I sold my 17" Powerbook 64 1.67GHz, 1.5GB RAM, 5K400 100GB HDD) which took about 35". How long does it take for you?