Here is an example that shows why. (Me texting my brothers, David and Nate):
Me to David and Nate: Can we all meet for lunch tomorrow @ 12:00?
David responds to everyone: I can do it at 11:30 does that work for everyone?
Me to David:Sounds good
Nate to David and Me: Vaccano, can you do that?
The problem here is that Windows Phone sends responses to group messages as a direct message. So to keep up a group conversation, I have to constantly switch screens between my Group responses and the individual responses of those I am talking to.
I hate to say this, but my iPhone could keep a group conversations all in the same screen/thread.