Well I've made that comment once or twice, I'm not trying to be insensitive but have you read the interviews or watched the interviews with people saying they saw it on tv, they heard the sirens but didn't think it would hit them? Another person heard the sirens but didn't want to change the channel on the tv, etc etc etc...sorry if I offended you, that wasn't my intent. The reality is you are correct, an EF5 would make any structure above ground level unsafe, but that doesn't mean you sit on the couch sipping your beer.I'm sure some people did some stupid things, didn't pay attention, and got themselves killed, but from the severity of the damage reports, it seems evident that many people DID the right things, took cover in the safest areas of their houses, and got killed anyway. The home I live in here in Kansas, while well-constructed by 1975 standards (when it was built), is a split-level ranch without a true basement area. I think it would stand up OK to a garden-variety tornado, but if anything worse than an EF-3 hit my house, I'd probably be dead, and I sure know what to do during a storm.
All the comments about people being stupid seem pretty damn insensitive to me.