Good! You've been lucky. A few examples from the last 8 years:

http://www.pcworld.com/article/160153/google.html

http://news.softpedia.com/news/Longest-Gmail-Meltdown-in-His...

http://arstechnica.com/information-technology/2012/12/why-gm...

http://www.computerworld.com/article/2486914/web-apps/update...

Keep in mind, when comparing it to your experience, is that not all customers are necessarily down when there's a problem.

I'm not dumping on Gmail, running a giant system like that has got to be extremely challenging to get right.

But let's not wear rose-tinted glasses about the cloud. It can be great, but for some applications you can get better reliability by competent people deploying reliable software on reliable hardware.