For those who may have taken a break from online poker for the last few days, we’ll tell you that Zoom Pokeris PokerStars‘ answer to the late Full Tilt Poker’s Rush Poker. In this rapid-fire ring game, players choose a game type (currently No Limit Hold’em and Pot Limit Omaha) and stakes (currently only micro-stakes). Then, they are seated at a random table. As soon as a player’s hand is finished, be it via folding or a showdown, he is hurried off to another random table with a new group of opponents. Zoom Poker is in public beta and players can sit at up to four tables at once.

Learn more about Zoom Poker.

But what has been Zoom Poker’s impact on the rest of the industry? To answer that, we need to look at what has been going on in online poker lately. According to PokerScout, an online poker traffic watchdog website, nine of the ten busiest online poker rooms and networks saw a drop in their cash game volume last week, with traffic falling 3.5% across the entire industry. Of the top ten, six saw a dip of 5% or more, a sizable figure.

One of the four sites that did not have its cash game numbers dip by more than 5% was PokerStars, which lost just 1.1%. According to PokerScout, Zoom Poker could be the reason for PokerStars’ lower than average decline and the steep drops of its competitors.

In a report released this week, PokerScout said that within the first few days of Zoom Poker’s introduction, about one-quarter of all PokerStars cash game players were playing the new game instead of sitting at the regular ring game tables. And because Zoom Poker hands are dealt three times as fast as standard cash game hands, almost half of the cash game hands dealt at PokerStars have been Zoom Poker hands since the new game’s inception.

Thus, PokerScout equates one Zoom Poker player to three regular cash game players, meaning that PokerStars’ cash game traffic is effectively up about 50% since Zoom Poker’s launch. Because so many players are spending their time at the Zoom Poker tables, surmises PokerScout, they are passing over other poker sites, contributing to the decline at PokerStars’ rivals.

You can view the latest PokerScout traffic counts to the left of this paragraph.

Despite the slight decline of 1.1%, PokerStars is still far and away the largest online poker room or network in the world, with a seven-day running average of 25,800 cash game players. PartyPoker is a distant second with 4,200 cash game players. The largest U.S.-facing operator is the Merge Gaming Network, which has a seven-day average of 1,660 cash game players. Merge, along with the U.S.-facing sites Bovada and the Cake Poker Network, also saw a traffic decline of over 5% last week.

Compared to the same time last year, PokerStars’ cash game traffic is down 17%, the result of losing its U.S. customers after Black Friday. By comparison, its next closest competitors, PartyPoker and the iPoker Network, are up 6% and 2% year-over-year, respectively.