I updated on my Mini and was expecting it to be a bit laggy. It's silky smooth and the transitions in and out of apps are lag free.
I'm not surprised that iPad 3's are having issues. I thought my iPad 3 struggled with iOS6 most of the time. It just wasn't fast enough for that resolution and clearly why Apple released a speed bump upgrade only six months later.
EDIT: I am noticing the Mini's lack of system ram though. Safari constantly has to reload webpages with tabbed browsing. It seems that iOS itself is using up a lot more available ram.
I'm not surprised that iPad 3's are having issues. I thought my iPad 3 struggled with iOS6 most of the time. It just wasn't fast enough for that resolution and clearly why Apple released a speed bump upgrade only six months later.
EDIT: I am noticing the Mini's lack of system ram though. Safari constantly has to reload webpages with tabbed browsing. It seems that iOS itself is using up a lot more available ram.