In response to "C"
I could be mistaken but .. I strongly think it would auto-respond to an auto response message
Here is why
AOL/AIM uses IRC, the basic means of communication in an established IRC session is a channel. The channel is kept open until you terminate it
With texting on a cell phone it goes threw the Short Message Service (SMS) protocol that is about 8 steps. but it does not keep a channel 'open'
The steps of SMS
Since SMS does not keep the channel open--...