Is Tegra 3 not ready for prime time on Windows RT yet?

Still, after several months, Tegra 3 demo devices are locked and reviewers interact with them on a controlled enviroment, while it seems Qualcom SoC are much more stable and Samsung, who currently uses them is not ashame to hand its RT tablets to the media.

The infamous Windows RT crash during the launch of the Surface makes me think that they are still ironing out stability issues and all this controls makes me think they are still far from getting it done.

Do you think the same? are you positive about Tegra 3, or like S4 more?