Good point, and easy enough to check. If it says "Made in Austria" and "Assembled in USA", you're right. If it says "Made in USA", they might be importing bar stock, but the parts are machined in Georgia. I don't own a Glock. If you do, or know someone who does, have a look.
AB
My glock says
"Made in Austria
Glock Inc., Smyrna GA"
But its about 8 years old. (Pre-foo foo grips) The new ones might be different.