Yeah, how good Irvine could have been will always be a debate.
Had the occasion to play outside Frogs eyes in a few lower grade games so I probably have an unfair advantage when discussing his pace, but to give you an idea of his acceleration, in a reggies game at Redfern he took a ball on our own ten yard line and lit the afterburners and I took off after him, by the time we hid the 25m he was about 8m in front and I thought F..K. By the time we hid the 80m I was only 2m behind and took the pass to score. I was quicker over the 100m but as I said he got faster each year by training hard and his 100m pace increased a lot.