In my opinion it wasn't too bad. After day 1, he was the best of the rest behind Neuville and Breen, who both had previous experience from this rally. Apart from Breen, everybody else lost over 30s to Neuville after day 1 and Tänak was "leading" the pack. Also he won PS so speed was there just not the experience. It was a very specific rally where previous knowledge seemed to play an important role.