Comment It's not the URL in the GET, it's URLs in the HTML (Score 2, Insightful) 379
I hope this is obvious to most people here, but reading some comments, I'm not sure, so...
The issue is that a typical Facebook page has 150 links on it. If you can shorten *each* of those URLs in the HTML by 100 characters, that's almost 15KB you knocked off the size of that one page. Not huge, but add that up over a visit, and for each visit, and it really does add up.
I've been paying very close attention to URL length on all of my sites for years, for just this reason.