Can't really comment; as pointed out earlier Toyota is likely not going to announce anything that would hurt today's sales. But a quick search around found these threads. None are exactly what you're looking for, I don't think, but are at least related to the topic:

http://www.greenhybrid.com/discuss/1...sted.6897.html

http://www.greenhybrid.com/discuss/g...tion.7264.html

http://www.greenhybrid.com/discuss/n...-too.5982.html

http://www.greenhybrid.com/discuss/t...aper.4588.html