Well if traffic trends on the WotC forums for the past year* are an indication, the number it's bringing into the game isn't enough to offset the numbers it turned off from the game.
*anecdotally related by someone formerly in a position to be aware of what those numbers were (which roughly correspond to the Alexa trends of the same time period for what it's worth). Trust me to trust that person I suppose for the accuracy of the claim.
Locally from what I've seen, 4e spiked and then crashed, with people going back to earlier editions, or more frequently trying other games and systems entirely. People get into D&D oftentimes because of people who are already gamers, and if a new edition sufficiently splits the market like 4e anecdotally has according to many, there are fewer people working to bring newbies into that new edition. I'm not seeing anything like the wave of new people coming into the game like I saw with 3e.