Yeah I definitely don't follow Robin here. Any win against United is huge, regarding a regardless of what squad they fielded or how we scored.
They used to beat us when we had much better teams than we do now so for us to beat them and beat Mourinho and beat their unbroken record is massive and I cared a lot. I meet way more United fans than I do Spurs fans as well so I've had to put up with way more shit from them due to their success over the last decade.
For my generation i think that the rivalry with United and Chelsea is as big as if not bigger than Spurs simply because Spurs have been totally irrelevant for so long. So yes, the United win is big and Phil Neville just reeks of sour grapes.