I saw him on two consecutive nights in the final London gig and can’t say that I found the tempo thing off putting. What was noticeable was a definite Slavic influence at times. On both nights, the last sets (in one case attended by only about 15 people left in the club) were sublime. The earlier sets got the chattering Gold Card business crowd and I felt Evans was a bit more prescribed, perhaps.
Will never forget though Evans looking in some pain and being literally supported and carried to the piano stool by a couple of women I think - Helen Keane I think, plus his girlfriend Laurie I suspect. Sobering to see as a youngster.
I would like to read this book !