I think the point he is trying to make (not sure he's getting it) is that HoN is becoming more of the official RTS Arena game than DotA. His evidence being that the changes S2 is makng to HoN are driving the changes IceFrog is doing to DotA.
Ever since I tried HoN, I thought it was better than DotA. I do believe it is better balanced. Still, HoN has the advantage of having an engine designed for this playing style. DotA does not.
Nevertheless, I don't think that people will forget DotA as the first popular game of this specific RTS gameplay. Well, that is until 5 years in the future, when later gamers/generations don't even know what Warcraft is, and only think "WoW" when they hear "Warcraft" . . .