I have yet to crack my OEM windshield on G. Knock on wood. Just a survey, has your windsheild been cracked/ replaced.
My bumper though, has suffered multiple rock chips

 

I got a rock chip when my car was 4 days old driving on Deerfoot, got it filled, then 11 months later it decided to spread across the bottom of my windshield. I haven't bothered to have the windshield replaced because the crack is not in my line of sight.

 

Ouch, that really sucks. Its not a surprise though, Deerfoot is horrible for that. I try to avoid Deerfoot if possible. Too bad i have to drive on Deerfoot to the Hyatt Dealership.

 

No chips or cracks so far.

 

I feel your pain. The one and only time I took my Z on Deerfoot was in the summer of 2006 when I was trying to get from the south to downtown in a hurry. 15 seconds into being on Deerfoot and CRACK! I got a rock chip. I filled it shortly thereafter, and although it hasn't spread, the spot is still visible. Seeing it in my peripheral vision still bugs the sh&t out of me!!!

 

One good size stone chip on my East Coast cruise. Got it filled, still holding up fine.

 

Replaced mine this week. Was probably OEM, if so it lasted most of 6 years before cracking.