Not sure that comment on being harsh on all British conductors is true; he's had a great deal of praise for Andrew Davis' Teldec recordings, a bunch of stuff on Lyrita, and arguably one of his favorite conductors ever is Alexander Gibson. And there are 14 reviews of 10/10 on his site for Colin Davis, plus a few "historic" 10/8s and 10/9s. (One of the 10/10s, an LSO Elgar 2, begins, "When Colin Davis is on form, he’s as engaging, exciting, and convincing as any conductor living or dead.")