Absolutely right. It takes MORE energy to drive a heavier bullet to any given velocity than to drive a lighter bullet to that same velocity. Add to that the basic rule of "equal and opposite reaction" and you know why a heavy bullet at any given velocity creates more recoil than a lighter bullet at identical velocity.
This of course is without regard to preception of recoil by individual shooters, intertial dampening caused by shooting any given load out of a heavy weight firearm of a given barrel length, vs. the load in a light weight firearm of identical barrel length, etc. Also does not address the issue of trigger control vs jerking or "slapping" the trigger, light pull vs heavy pull and effects on accuracy for shooters of great vs poor ability, etc., etc., etc.
Smith and Wesson will shoot guns from a machine rest, removing the human factor to either prove or disprove claims of inaccuracy.
Just my $0.02 ( or maybe more)