No prizes for which way I voted! However, based on conversations with my contempories at soul venues, I do think many of those 21% who don't like it could be from the generation of soulies whose roots are in the 60s basement clubs and are therefore now aged in their late 50s and over.
The reason I say this is that the Frank Wilson track is seen by many as an anthem for 'Northern Soul' of the 70s and many of the older soulies don't have much of a connection with this era. In particular they don't recognise the term 'Northern Soul' as it was coined after their heyday and feel therefore that it is more associated with the stomping beats of the dance hall venues of the 70s, which brought with it those dubious baggy trousers, vest, patches and beer towels! My point therefore is that in my opinion, many of those who, like me, think that it's overated and overplayed, do so as much because of what it represents than it's musical merits.
HEALTH WARNING - If this posting reads like a dig at the 70s soul era, it is certainly not intended to be, no-one can help when they are born or the fashions of their generation (you should have seen me in a Kaftan with flowers in my hair - not much chance these days !) In fact, if it wasn't for the 70s scene and it's prominent DJs in particular, I'm sure I wouldn't be enjoying all the sounds that they unearthed during the 70s, even though they had, in the main, been first recorded in the 60s. So good on you 70s soulies, I will be forever in your debt.