Yes, I had found it too but I mistakingly disregarded it because of the "Asia" on the title. Yet after a quick browsing through the document I couldn't find the information I was after. Or at least not as detailed as I would like and need. It mentions Linux and several Windows breeds as realtime systems (perhaps Linux with RTLinux or RTAI extensions) and VxWorks and put all the others players as "others" hiding the information I am looking for: it confirms VxWorks as a strong contender but doesn't show their main competitors (other than Linux and Windows.)
As very different product categories are contemplated in this poll, I wonder how the players do in categories (life/security critical apps) in which Linux and Windows are possibly not the best choice (consumer and telecom sum nearly 50% of the end markets in that poll.) Considering 55% of the respondents were Chinese, I think it is reasonable to inferr commodities had significant weight in this poll.
So I guess the question is still open. I browsed Dataquest's site but it seems they haven't done any recent poll on RTOS market. I wonder if there is other organization which has done it and that I could have missed in my search.
Regards.
Josias.