Hi dizoz
In his 'Crossword editor's update' of 3/01/2011
'Happy Crosswords in 2011.' Hugh Stephenson states:
"Our January Genius is also by a new setter, Tramp."
Now this may be a new name but I, and several others by the look of it, wonder if this is just a new 'Nom de guerre' of a very well known existing setter.
This Genius 91 is identical in structure to Genius 81 (March 2010) - the grid is the same and the special instructions are identical; No 81 did have a hint to the 4 initial letters - "The four letters that begin the solutions may be arranged to give something to drive." Which turned out to be H-E-R-D, you may remember.
No such hint this time but the 4 letters are P-A-U-L!
Given Paul was the setter of Genius 81 there's something funny going on here.