The only one i’ve seen who gives actual numbers is Survey USA and they are way off usually.
A target sample is just that, a target, they may want 36% dem and 31% repub sample but if all they get after they call is 40% Dem and 25% Repub sample, then thats what they use.
It all depends on the randomness. target is just that a target.
after all Rass and Gallup only say their targets, they never actually say what thier real figure or if they are over or under target, so you cannot tell.