I agree that there are some rigs
where a #2 is necessary. Its one of my big gripes with the CCA and IOR era rig
proportions where the 155's are too big once the wind gets over a certain point, yet the jib
is the prime motivator so that you can't afford to go down to a #3.
The original poster is talking about a modern fractionally rigged boat, where you don't need the extra sail in a #2 since you can power up and down to fill the gap, and frankly, due to the rig
geometry a #2's lousey sheeting angle becomes the limiting factor for the whole boat when going upwind.