Gobby McIlroy complaing that the courses are set up too easy in Europe compared to the US as he shot -15 and only finished ~30th.
The average winning total on the US tour is ~266, the average winning total on the European tour is ~270.
Standard of golfer on the PGA is much stronger than the European tour so it will be lower.
I don't know for sure but i would also hazard a guess theres more par 70s on the pga tour.
Rory just seems to have a lot of beer with the European Tour these days but hes not coming out of it with much credibility.