You should learn to ignore XP - it's quite useless. ;-) For example, just take a look at TheDamian's XP, and compare with pg. Now, pg may indeed be a perl genius. Perhaps a 9 on a scale 1..10. But TheDamian knows more about perl than, well, I think perl does. :-) XP is just a number.

That said, pg otherwise appears quite knowledgeable about Tk, so take his advice anyway. Do it because he's knowledgeable on the current subject, not because he's got more XP than :insert person:. :-)