He's got a point. AOD has been out far longer than DH. Also, AOD absorbed a whole lot of fans because of the recent disappointment with HOI3
I think the simple fact that AoD came before DH and was the first fan produced spinoff. This created a lot of initial buzz and lead to higher sales. DH came after AoD and IC so it got overshadow at first and probably thought of as just another one of those fan spinoff game.
Two things. If it's logical, that first release absorbs more fans (and this diluted DH's unit sales), how about the other fact that more expensive product sells less units (and this diluted AoD's unit sales)? If prices are different, sold units aren't the best measure comparing two products. If you already take this commercial view about perceived quality (customers voting with their wallets), lets focus on revenues.
As mentioned before, in total revenues AoD has done better. But what about time? If you compare revenues per time periods games have been available (multiply sold units with price and divide with months), based on Johan's figures and prices I posted (you can recheck them through the Internet, if you have a doubt),
even with conservative estimation that AoD has been priced all the time it has been out at €13.95 (this was its actual price still in this spring, now it's €9.95, but at release it was (and must have been for a some time) €19.99) the two games have sold more or less equal when adjusted with time. I don't know when AoD's price was brought down to €13.95 from €19.99, but I believe it was actually late enough to justify a claim that AoD has sold slightly better even in revenue per time unit sense.
I'm bothering you with all those figures only because it was predictable that time factor is brought in, that we'll get stuck in minor details, and get sucked into yet another fruitless DH vs AoD debate. The whole point of this discussion -- at least for me -- is that someone with reputation, authority and respect has been very creative with his words for a long time, to put it politely. If you think that anything goes, it's not a big deal and it's just one-time slip, it would be impossible to convince you otherwise and I even don't want to. But I don't find that a haughty and slighting tone is something marvelous that we all should approve, especially if it's based on feeding false claims with self-serving purpose and using one's position as a cover. I don't care, really, how much DH or AoD or FTM "have sold", but I dislike narcissistic and dishonest personalities, and general indifference towards their actions.