EASY WAY TO FIND OUT WHETHER THOSE SIGS ARE HIS:::
Ask for his first name, then Tell me.
On Second Thought: It seems as though TehNoob apparently has some graphic talent, (if he is not in fact ripping them) and as such, it is curious that he would use a signature created under a different alias. He could just as easily make a version of the sig with TehNoob as the name (He already has the .psd's doesn't he?)