"The Xbox One program has been in development for years, so calling it "rushed" is incorrect," Major Nelson said.
Since Microsoft revealed the Xbox One in May the company has been answering a variety of criticisms of the next-gen console, including reversing the digital rights management policies that would have forced gamers online all the time.
One of the latest concerns raised include a Chinese-language publication reporting manufacturing issues leading to lower shipping forecasts.
Microsoft chided the newspaper, saying the lowered forecasts were to the same voice command language issues that will cause the delay of the Xbox One launch in several European markets.
"Did we have a few challenges between May and August? Sure. But we are working on our own schedule, not any one else's," Major Nelson said. "At gamescom, every game in the Xbox booth was running on final Xbox One hardware. Every. Single. One. That would paint a very different take on the being 'rushed.'"
The Xbox One is tentatively set to launch in late November.