I agree with EJ, Clapton achieved "bluesality" in his version of Crossroads. I have listened to both Johnson and Clapton back to back to hear the influence. If Clapton lives to BB King's 80 years he may play more sparingly. But BB's spare approach is not the only model in electric blues players. T Bone Walker and Clarence Brown have been known to cram a whole lot of notes into a line. And ain't nobody asked do they play 'real' blues.