I don't do farmed shrimp for taste reasons as much as for support for the local shrimp men here in Charleston. The industry is dying, as more and more restaurants and stores started buying cheaper farmed or overseas products. Fortunately, there's a huge campaign now to 'buy local, buy wild', and more of the restaurants are endorsing it, along with only buying local fish, also. So we see restaurants with all the local fish - grouper, snapper, tuna, mahi-mahi, flounder, and much less of the 'chilean' sea bass and salmon.
There is a taste difference between wild and farmed shrimp, tho - having experienced both, the fresh, sweet, oceany taste of freshly caught wild shrimp can't be beat.