The weight: http://www.glockfaq.com/content.aspx?ckey=Glock_FAQ_Glock_Model_Guide#g20
Curious as to what you shoot as well since the Glock weighs so little. My 10mm is a S&W 1006, so it's a brick in comparison.
I have a Springfield TRP 1911 which anyone can shoot the center out of with there eyes closed. I also have a Sig p228.
When I bought my Glock 20 a year ago I was at a very popular gun store in Illinois no one at the store every shot the 10mm except the owner and a couple managers. So a couple of the sales guys and I went to the range bought a couple boxes of American Eagle 200 gr target rounds. Now you have to remember those American Eagle Rounds are water down and not the full power stuff the FBI couldn't handle. We all were waiting for a big kick with it but really it was a comfortable kick. I dont know if it is the Glock grip angle or the lower bore axis but it was really fun to shoot.
The reason why I went with the Glock and not a revolver is because I can not shoot a revolver for the life of me. I tried a Ruger Redhawk Alaskan .44 mag, S&W 629 N frame and could not shoot it well. Even the hotter loads of the Double Tap ammo was a lot easier and more comfortable to shoot. I went with the Stainless steel Guide rod for a little extra weight and a 20 lbs spring to help with the recoil and wear and tear. Still with the Glock stock was not that bad. With those two little mods that cost like $35 total made a pleasant gun to shoot, to making it almost a dream to shoot. Still nothing beats a well made 1911.
My Glock is my hiking canoeing gun that is why I bought it. I love it to just as much as my 1911 and Sig. I dont mind beating up my Glock because it was only $498 NIB (law enforcement discount) hence why I got it. Where as if I scratch up my 1911 or Sig It bothers the hell out of me.