It's highly unlikely that they would be fabricated, as in many cases fabrication of the device name would require modification of the device BIOS, or if it doesn't have one, its identifier... that's very unlikely. It would take a some effort by someone who knows what they are doing (we're not talking about your average computer user).
Pretty much all Windows applications use the same service/interface to access system information, so if you're concerned about fabrication on a software level, boot into a live CD of some sort and see what it says about your hardware. If you really, really want to make sure, open up the laptop and look at the components inside, often they will be marked. If you are even more paranoid than that, disassemble the individual components and look at the data sheets on them (if available).
But to be honest, it's more than likely they're not going to fabricate the information being given to you. It's too much hard work, and too easy to demonstrate that they've done it.