That's all it is - rumors, and wishful thinking - there's rumors about SAM dps, RDM dps, BLU dps, DNC dps, RNG dps, BST dps, as well.
Anyway, there's nothing awkward about RDM using both melee and ranged, it could be like BRD using minuet - some skills are instant, while others are cast - you use WS combos, and cast some nukes; you can throw out some "scathe" while dodging aoes.