No it doesn't. Friction robs energy, which also robs velocity at a given pressure. It's not as straight forward as pressure=velocity. There are other factors that contribute to the net effect. Look at it this way, if you push something equally as hard, but have less friction (like a lubricant or a bullet with less bearing surface), it goes faster.
The part of the explanation being left out is the fact it is not a single moment that determines velocity, but a complex equation written over a fairly long period of time with several different things going on.
Look to free-bore effect as an example.
