Ravens offense - tendencies for big game

After watching the Ravens play the Steelers twice, Tennesee and one or two more games - I think I see an obvious trend.  Flacco throws a very high percentage of passes toward Mason (#85) during the first 2 -3 quarters of the game, especially on 3rd downs or in more critical situations.  From about mid-way thru the 3rd qtr onward, he throws these passes to Clayton (#89) with ever increasing frequency.

I watched parts of the Ravens-Steelers 2 regular season games last night on NFL network.  It reinforced my opinion as formed watching the games live.  Without doubt Mason is his favorite guy.  I don't do fantasy football - any of you stat guys confirm my suspicion here?

More interesting Flacco stats are that he has higher passer rating in games where he throws more passes and that he has higher rating when the team is behind than when they are ahead.  These seem inverse of typical young QB wisdom but I looked some stats up on NFL/Ravens page... interesting.