Yes, they should. If you look at the number of fastest laps set by the teams, which IMO is a more valid method of measuring race performance than is qualifying, Ferrari has only been the third fastest car this season. Mercedes has the most FLs, followed by the RBs, and then the Red Menace, with one-third as many as the Bulls. If the RBs had anything like decent reliability, they might have been able to really challenge the Mercs. The difference in Ferrari performance between qualifying and racing would seem to indicate aero problems when they are in dirty air.