I'm one of those people pretending my laptop isn't overheating. I could keep this pretence up indefinitely due to the cool temperatures of the machine.
This is a HP Pavilion dv5000 with AMD Turion64 and is definitely well used. We replaced it with a Sony for my wife as it was getting very tired looking. It had XP on it and was always warm and noisy due to the fan running at speed.
It also suffered from the vertical colored bars on the display once or twice a day!
I installed Mint 11 and my Conky readout shows the fan turns on at approx 45degrees (at low speed) and cuts out at 43degrees. If i watch Youtube videos the fan will get noisier but the temps remain very reasonable. The vertical bar glitch went away completely when I installed Mint. Never had a single issue since. That's 3 months fault free - ( the heat glitch was a daily occurrence with XP installed ). I have no reason to favour one over the other except Mint suits my machine fine. (and my Acer).
This is a 5 year old machine, never been stripped and cleaned running much quieter and cooler on Mint 11 than it did on XP.
In XP this laptop pushed out a lot of hot air. In Mint it doesn't. I intend to continue pretending that means there isn't a specific problem with Mint over XP.
(I am now going to vacuum it at the first opportunity though since I saw that it made such an improvement to users that did have a heat problem. Hopefully after I've cleaned it out it will chill beers).