Well if that's the case the next place to unveil it will be at Taipei Bike Show in March (like Campagnolo did with 11 spd). The problem is that it doesn't fit the Shimano production schedule and it would pretty much be too late for 2011 model year.

There is Taichung Bike Week the first week of December. It is an old fashioned hotel type show that is focused on Product Managers and is strictly industry only. A lot of booking happens there. I will be there for 2 days. If nothing surfaces there then I would consider the rumour "BUSTED".