That is true. The more processing power that you try to get out of the laptop the hotter it is going to run. Because the space in the laptop is so compact it is hard to keep the processor cooled down when you are running programs that really work the processor.
They need to find a way to get better circulation within the laptop so that the processor can be kept cooler. Maybe try using a refrigerant that runs through a heat sink.
Best be careful with Dell computers, since they have a high temperature when running....and this can have bad effects, like blowing up the batteries.
Moral: Avoid Dell products. They might be cheap, but it will burn your pocket. Literally.