Well now I'm just totally confused. You said you were getting ready to drywall but the pictures show the drywall already in place. So I guess If you aren't having any problems just leave it alone.
Also looks like the drywall was glued up as well in addition to nails/screws.
I tried to find any reference to 32 OC joists and found your other post on yahoo answers.
http://answers.yahoo.com/question/in...7005214AARFdGk
I think a call to your local county construction code office is warranted to see if this is acceptable practice in your area. I did a look up of the span allowed for 2x8 SPF lumber for ceilings with no storage above based on 24 inches on center and it is 21 and 1/2 ft.
Your span looks less than 21 feet so maybe that construction can support the weight in total. Since they didn't use any furring or channel running perpendicular to the joists to improve the support I'm guessing that over time (decades) the ceiling will sag.
If you are planning on living in this house to the end of your days I would redo the ceiling. If you are planning on moving in a decade just live with it.
Just an opinion from a INTERNET hack.