The short answer is no!
ALL to me includes R & B, AFROTC will only pay for tuition, as Jcleppe stated there are 3 types and the amount they pay varies.
The reason many AFROTC scholarship recipients say they have a full ride is the quality of the recipients from an academic perspective usually gets them merit scholarships from the college which they can use to pay for R & B.
Additionally, there are some colleges that give reduced rates for ROTC students. There is a sticky at the top of the ROTC forum that discusses the schools that people know of who offer these benefits.
It has been asked before about if the tuition is lower than the 18K (Type 7) will AFROTC credited any remaining portion to the entire cost. The answer is NO. If the tuition bill is 12K, they do not allow the bursar to use the remaining 6K to R & B, or cut a check to the cadet. It is 12K and that is it because that is the cost of the tuition.