Doubt it matters Ott starting 1st, I'd be surprised if he doesn't win the event regardless. Although the cleaning can/will make a difference, it's not as bad as certain other events and we've seen Ott cope remarkably well with the cleaning effects this year anyway.

Only way I can see him even challenged is if Jari comes with a good mentality, makes no mistakes and has a brilliant Friday. Or maybe Suninen as an outside bet.
I would've put Meeke in that mix as well, but him not being there last year (when the route changed massively from previous years) will probably harm his chances.