Fedora's Thermometers

Ok, so I just upgraded from Fedora Core 5 to Fedora Core 6 this morning. When I started the upgrade, the "Remaining time" was 125 minutes. By the time the thermometer was 1/4 the way full and it told me to insert disk 2 it said that there were 195 minutes remaining. I'm not sure, but the last time I checked 125 was less than 195. I'm not sure exactly what algorithm they're using to calculate the thermometer and the time remaining, but I don't believe it's 100% accurate.

Now, if you think that's funny, my cousin is now upgrading his system as well, and we have exactly the same package configuration. Well, when he inserted disk 2 the thermometer was roughly 1/3 full and it said that he had 1350 minutes remaining. We asked Google and it said that that's about 0.9375 days. I really hope it doesn't take that long. Of course, it's only been about 5 minutes and now it's saying 1175 remaining. But 1350-1175 = 175 (according to Google), which is definitely larger than 5. And in the time it took me to type the last sentence the time remaining says it's been 70 minutes. And I don't type that slow.