Until it's stood the test of time it's pretty hard to confirm that you wont do damage to your cpu, hell even at 1.05 you should probably expect the cpu's life to be slightly reduced compared to stock frequency, but realistically how do you confirm that until a few years down the track, even then it would be pretty hard to prove conclusively.

It's hard to go exactly off other phones results as the conditions the cpu lives with aren't necessarily the same, they should obviously be a good guide though.

I haven't noticed anyone else report this so far, well besides something rainisto said way earlier that may be taken similarly, but on my N9, at 1.2ghz I find it stable with or without smart reflex, well that's normal but bump it up to even 1.225 and I eventually get a reboot even if it's not for a day or two, I'm yet to spend any time playing with the voltages mind you.