No. The news themes we have here are tried and true when running on wordpress.org software, which is what they were originally designed to run on. I don't see lots of themes questions on these themes in the wordpress.ORG forums.
I'm sure Staff do cross browser testing and test the adaptations they make to the themes themselves several times before they come to us because no adult wants to turn out work that doesn't work well.
As there is no official BETA testing group here for these newly adapted themes for a short after introduction there may be a bit of a bumpy ride for the first adapters, until all the kinks are identified and worked out by the Theme Team.
SHRUG ... no one is compelled to take that short ride. ;)
I like testing these adapted themes in my test blogs. So the way I see it is that those who don't want to risk a bit of a bumpy ride or can't handle one, can stick with the themes they have until they hear the new ones are running smooth as silk. :)