Mr Moo, I honestly don't give a flying crap how many data centers, BGP peering points how slick their overnet is, how smartly they GEO load balance. You can wank over the brouchureware and think of it gospel if you want.
I can also introduce you some Google Apps customer that have only been with them for 3 months and already reporting to me their down time.
Simple test, how did they cope when the cable broke in Taiwan around 18 months ago? They were not accessible for 4 days. I recall that at least 30 people on this forum where using our proxy server to get out onto the net. Even when Google place their servers in HK, there are just many ways their network can implode.
Google/Yahoo do go down, particulary because their network complexity and fault tolerance functions fail. If they could keep it simple yes maybe they would be more reliable than us, but the truth is they can't due to their scale.
We are not infallible (no doubt murphy will visit us next week!), but we will piss over them time and time again on reliability due to the clever, yet simple of fault tolerance.
It is normal for you guys to want to defend the decision you have made joining Google Apps. No one wants to be wrong either today or after 3 years of putting up with a crap service. When that day comes, I'm sure none of you will join our service then.