The small plates thing has gotten out of hand, no doubt, but the first time I had "small plates," tapas at Emilio's in Hillside sometime in the mid-90s, it seemed like a good idea. The small plates were truly shareable, permitting two or maybe three people to have a few bites of each, which was just fine.
With the evolution of the market for "small plates," restaurants may, indeed, be using it as a way to squeeze higher prices out of less food, but the original intent seems to have been a good one.
Due to both age and an increasingly jaded palate, my preference is for smaller plates rather than a big plate of anything, which always -- about half-way through -- starts to feel more like a job than a pleasure, however good the food may be.
"Don't you ever underestimate the power of a female." Bootsy Collins