We could get into and endless debate about SLA's, their meaning, and their value. I don't think our bar for GA and the SLA are correlated. nknighthb's interpretation is correct. The bar has to do with a wide variety of other factors including our commitment to the business, how we are focusing on customer support, view of go to market and investments there, technical aspects like performance consistency, data throughput, peering, private backbones, encryption at rest, hardware, and so many other layers. We could have just said "GA" in May at IO when we also had an SLA of 99.95% but the SLA isn't even close to enough. It's just a factor and definitely not the most important one.
Hang on, I think I have just realised a mistake on my part.
In your quote on the site when you said "General Availabilty" you were referring to the releあse.
I mis-understood, I thought you were referring to "General Availability" as a synonym for uptime (Probably translated to "High Availability" in my head), not in the "released to General Availability" sense.
Hope this helps clarify :)
-Brian