Are you saying it because it passes the compound faster or is there a breakdown with the 25Ga that you end up losing compound? If it is a matter of time, just like bodybuilding, patience is a virtue and I don't mind waiting just a little longer with the smaller pin.
The thing is, if you have to press like hell, and it wiggles all around, it makes for a hurting shot.
I find more'n 1cc thru a 25ga is hard to press and not stay still.
The depth of the shot and t he particular muscle also has a effect on release rate. Its meant for "Deep IM injection".
But like most of us care if it releases faster than intended