Who really cares about ‘up time’ ?

A Slashdot post caught my eye this morning –

“Twitter Leads Social Networks In Downtime”

“A study on site availability by monitoring service Pingdom shows that in 2008 Twitter greeted users with the ‘Fail Whale’ for more than 84 hours, almost twice as much as any other site. At the other end of the scale imeem and Xanga managed less than 4 hours of downtime for 99.95% uptime. Myspace, Facebook and Classmates.com were the only other sites studied which managed to stay up more than 99.9% of the time.”

Does the old “5 nines” availabity mantra not apply anymore? (BTW, I was never a big fan of that one anyway )and given the ever growing popularity with twitter, it begs the question, are twits just more forgiving than other users of technology / IT solutions ?