Sadly, I personally can't see how this remains to be the case any longer... RBR with Newey or Dall'Igna with Ducati have been in championship dry-spells for a really long time (last year's win for RBR was the first championship where Mercedes didn't dominate all season like they have since the introduction of the V6) and have only managed to come 2nd best for some time.
I don't buy this. The basis for TFA and the reason Newey is back in the spotlight is because of this current season. RBR is the only team that has nailed the regulations change. The porpoising issue alone makes this clear.