I don't recall any other downtime in the past year that has lasted as long as the one yesterday. I believe there was only 2 other outages, one again was my provider and was a month or so ago. A car accident took out 10 of the fibre lines and the other was a massive DDoS attack which cause some sever latency.
I run a tight ship so if you have a problem, let me know as what I see as working from my point of view, may not always be the case from a miners perspective. I always post, at least to twitter, if there any issue occurring that I'm aware of.
Cheers!