But how much extra flying speed might you expect to gain from a quick burst? 5kts or so? I don't think 5 kts would make a significant difference to the total lift available from the wing. A pitch change makes a bigger difference.
If I was flying a conventional aircraft, then the burst of power would help raise the nose, and the extra 5 kts would make the aircraft feel lighter in pitch. Unfortunately when Bernard Ziegler designed the A320, he didn't put the aircraft into Direct Law during landing, so we are stuck with the feel it has with a reference pitch attitude remembered at 50 feet.
Nobody mentioned 5 knots, try not to quantify this - this is part of the problem. Basic Airmanship taught to people in Cessna 152's the world over, sense the sink add power and pitch, reduce the rate of descent. As opposed to blind faith that automatics will sort out all enviromental occurences.
I remember being parked on RS1 at Heathrow very early one morning when an A340 came into land it was very gusty and the aircraft was flown onto the ground with lots of additional power on a number of occasions at very low level. I remember thinking that a lovely approach could be flown under difficult conditions especially having "been on the road" for possibly 12 hours + (inc crew rest etc etc)