I'm waiting for the Vita update to stop notifications when friends come online.
It works fine on Vita for long time now ...
Also -as a side effect - the advanced notification settings (on the same PSN account) set on Vita were also working on PS3 although it was not possible to configure it directly there so for example I have all the notification bar Trophy disabled from the start on Vita and it works on both Vita as well as PS3 for months now.
So the internal functionality was already implemented earlier and now they're adding the controls for it on PS3 as well.
wow a firmware upgrade to opt-out trophy notifications and causes massive semi-bricks to anyone who upgraded. Well that's really something.
Although I think that opt-out thing is kind of useless, I never bothered having me notified I earned a trophy. They should just flag this firmware update as a optional firmware update when possible since its useless anyway.