In the UK, where I’m from, it’s widely considered 360 won too.
The reason the PS3 won in the end I think was due to a worsening opinion of Microsoft towards the end when the original plan for the Xbox One was being discussed and shown, along with a lot of teenage gamers now being older with more disposable income allowing them to buy a PS3 later in the generation and trying out all of the exclusives they missed out on.
I don’t know how true this rings out in general, but that was pretty much my experience.