Banana Receives
Perhaps the biggest change at the higher levels in table tennis in recent years is the advent of the backhand "banana" receive. This is the nickname used for a backhand topspin flip of a serve, essentially a mini-loop, with the name referring to the curve the racket goes through with the stroke. It's done against any type of spin, but it's against short backspin that it is most effective. Some do it with straight topspin; most can add sidespin. It's much easier to do this type of shot on the backhand than the forehand, where the wrist is more locked, and so more and more players are covering more and more of the table with this backhand shot. At the U.S. Olympic and World Team Trials this past weekend (Feb. 9-12), it was the receive of choice of nearly every player.
Some players used it nearly every receive they could. Others mixed it up with short pushes. The ones who didn't use it much were thought of as "old school," while all the younger players used the banana flip over and over.
From a server's point of view, it complicates things. If you serve short to a corner, you give the opponent a wide angle. So most short serves go toward the middle of the table, which is easy for the receiver to banana receive. (If you serve long, then it usually gets looped much harder, so that's only done at the higher levels as a surprise variation.) This means most rallies start with the receiver getting in at least a mini-loop. About the only way to avoid this is to serve very wide to the forehand. The problem here is that the receiver then has a wide angle into the server's wide forehand, and since he has to cover that, the server is open to a simple down-the-line receive to the backhand. (This is for two righties; lefties would reverse all this.)