9 points across 5 seasons is nothing in comparison to how far ahead you have been of us so it does prove that point somewhat don't you think? You were more than 9 points ahead of us last season alone!
Your performance without those sides is 2.2 points per game compared to our 2.0 points per game. Considering we're both around the 0.5-0.6 mark against the top 6 sides I think winning the games you should win has definitely played it's part!
Considering those points are usually won in "6-pointer" type games, they're worth a whole lot more than simply 9 extra points across 5 seasons.
Especially when a potential result swing in even one of those games per year would usually be enough to change the order of the top 4.
Granted, it's not a monumental difference. But it's just as much in our nature to put in a solid shift against a top side and then conk out to Watford a week later (refer to this post in 2 weeks as it happens) as it is for Tottenham. We don't own the poorer sides as much as some people think.