I tested with a 83+ and a 83+.fr, here my 83+ was everytimes under 190 while the 83+.fr reached 190 several times. After that I tested two 83+.fr (more recent) and it was several times around 190 to both. But each time it's random.
(sorry to my bad english.. :x )
EDIT : I've no problem on ti-connect with my calc (83+), so why it can't work perfectly ?