Perfect, just what we all wanted. :|

That's a very good point. If Impulse doesn't start gaining the ability to sell outside of the North American market, how big can this really be? The biggest PC gaming audience is in Europe...if you can't sell there, you're starting off behind the eight ball.

It's their lack of market share in Europe, coupled with the fact that they are consistently running sales on a particular game 2nd or 3rd after competitors, that really makes me call their claims at being the #2 digital distributor in to serious question.

I don't know about market share, but I once compared different DD websites' hit statistics through Alexa: Here's the rough result: Steam >>>>>> Direct2Drive >>> Gamersgate = GOG > Impulse.

Won't GOG, D2D, and GG get a disproportionate amount of hits since those are browser-only stores? The Impulse client doesn't actually connect to the impulsedriven.com main page.

Despite what people would have you think Impulse is nowhere near #2.Gamersgate, D2D and even GOG rank above Impulse. Simple fact is Stardock only care about the US. Therefore the whole market is leaving them behind.

That depends. Catshade didn't elaborate on which exact sites they checked. Seeing as GamersGate have two domains, Direct2Drive have 3 domains, and Impulse/Stardock have at least 2 domains that sell directly over the Internet and Alexa tracks each of these independently.
But I expect that if you add up all the traffic for each service to their related sites, Impulse/Stardock is still going to be far lower than that of GamersGate/D2D. And this isn't even considering sales. This is considering the number of people simply visiting the sites regardless of whether they purchase or not (in fact, it's fairly safe to say that the majority of visits to any site are not going to result in a sale).
So if Stardock/Impulse are getting significantly lower traffic to their sites compared to the other services, it's safe to say they're getting significantly less purchases regardless of whether those purchases are going through their client or their websites.

Ah yeah... I only compared the .com sites; Forgot that GG and D2D have different sites for their UK/EU store.

I don't know how anyone can claim "facts" when no sales figures have been released. Steam is a safe bet for #1 because it has so many users, has been popular for so many years, and appears to have a strong following on the web. Of course, none of us can prove that Steam is #1. Speculation as to Steam's rank in the digital distribution world is fairly reliable, but the #2 position is more difficult to determine, let alone assert that any rankings, sans sales data, are factual.
None of my American gamer friends know of Gamersgate. While very few know of GOG, a larger portion know of D2D and Impulse. None of these observations are meaningful, however.

Impulse has a smaller catalog, it is regionally restricted, it has worse sales on average that its competitors and it is younger (as Impulse at least, I'm not counting the old Stardock digital store for its apps). I think it's a fair assumption that the claim that it took 2nd place in digital distribution sales is BS.
For anyone that cares: http://frogboy.impulsedriven.net/article/378254/ImpulseReactor_FAQ

I think,i'm the only one,who didn't buy game from GamersGate.