In my case, there is plenty of time when I am without reliable internet (when I am visiting parents, when I am traveling)
Aside from all that, by giving up LAN, I am now forced to trust someone else's system that I have no way to fix myself if there are issues.
I understand you have faith that battlenet will never have any issues at all. Personally I am skeptical, and I now will wait and observe rather than try to get it immediately.
Too me its just adding another step that doesn't need to be added with more things that could potentially go wrong.
Yes I am a fan of the Playstation 3, but I am an even bigger fan of intelligent and rational dialog. (If you are up for an intelligent exchange of ideas, you are more than welcome to add me as a friend)
PLAYSTATION®3 is the future......NOW.......B_E_L_I_E_V_E
(haven't been playing much since I am broke)