That's interesting - the wide spread of ability scores, defences (and sum of abilities) led me to wonder. It's nice to see an illustration that point buy doesn't have to mean 'rampant min-maxing' (I've seen numerous assertions that "You've got to have a 20 in your primary stat to be worth playing, or an 18 if you don't mind being suboptimal" or some such; personally I don't believe it, and I draw comfort from the fact that you guys don't believe it either!)
In my current 4e campaign I decided to get people to start with the standard array + racial mods, and that is working nicely for us at the moment. I'll probably let them loose on point-buy next time
Cheers