Me and my friends (I'm from Brazil and the majority of my FC is from around the US) have had problems a few months ago, but everything seems better now. I did disconnect once or twice throughout the past two weeks, but that's far better than several times every day, sometimes within 5min of each failure. Two or three of my FC mates have been having constant connection issues, however, but they usually blame it on their ISPs. I'm not sure where exactly in the US they live and if their problems could be caused by having the same ISP, though.

But in all honesty, Square Enix isn't wrong in blaming ISPs. I'm no IT expert, but I know managing this kind of thing is definitely not black and white. I'm sure that if the source of the problem was within SE, they would come forward with it as they have so many times before. I have no problems in blaming my ISP bc I know how shitty they can be. Had many problems with them before, as anyone has with theirs.