100% probably not, but I don't see why extremely close to that isn't possible. I have 11 S1s that are currently sitting at around the same uptime (27d 5h 2m 48s) since that's when I last messed with my electrical setup. Bitmain makes a pretty reliable product once it's set up. The S2 had issues when I first got it, but other than that it's been great too.

That being said, I wouldn't bet on an S3 hashing by Sept 14th. They claim Sept 20th, and while they might start shipping on the 11th I wouldn't bet on it.