As the owner of a very large and sucessful HVAC company.I just had to reply to this one,
If anyone doesn't thnk that you can cool an area faster with more 55 degree air than less 55 gdegree air you are just plain dumb and shouldn't be in this field at all. (See the section in VAV101)
If your answering questions about superheat, just remember you are taking that reading at the outside unit for conveience only, the only reading that matters is at the coil outlet.
Most of the air leaving the room is getting recycled across the coil and sent back into the room
It is the 55 degree air that is cooling the room nothing else. If you have more of it the cooler it will get. GEES O MAN