Funny you should say that, jbaent, because to me it seems to be more of a group thing now. It depends on how you look at it of course, but there are certainly fewer extended guitar solos on Mark's part today, leaving room for others. Yet the contributions of the band are seldom as pronounced as, say, the sax, which tended to dominate proceedings whenever it was brought out (and it ruined Sultans for years in my opinion).
Along similar lines, it think it is fair to say that the guitar defined DS all the way through, and still defines MK solo; but clearly, with more acoustic songs these days, the guitar is less up-front now. I was also suprised at the comment about the voice defining DS. Of course it did, in combination with the gee-tar.