I don't think I am missing the point, not my point anyway you and others are IMHO by resorting to chart records that have absolutely sod all to do with northern soul apart from the use of dancers and a dj to warm thew crowds up when there are loads of good recortds totally ignored from the 60's to the present day that should be played instead of resorting to chart dross.
Very few James B records I listen to and I don't know when Spencer Davis was last played at a Northern venue and to be honest it shouldn't be, it's not what I want to hear anyway.
And Duffy wasn't recorded in 1975 so it's all hypothetical really. Said what I want to say, this is just going round in circles.