Keep in mind that these systems have more powerful components than say, mom & pop (less powerful) office systems with slower processors and integrated video chipsets to which most people are used to. Thus, they generate some more heat and feel warmer.
One of the main higher heat generators on a mobile system is the dedicated graphics card. Since this is an additional component on systems made to handle heavy 3D graphics you will notice it kicking in when gaming or running an application that uses 3D graphics.
That and the faster processors on these, the faster the processor the more heat it will produce, do not worry about the extra heat, it is normal.
Of course, if you suspect that the system is overheating beyond its acceptable levels you can give AW a call and ask them, they will determine if the system is functioning within the normal heat levels.
When I upgraded my laptop from one with an Nvidia 8400 to one with an Nvidia 8600 I definitely felt that it was a bit warmer because of the higher video card but nothing to worry about.
All companies have had their share of bad systems here and there. If there is a problem AW will look into it.