By measuring cell IR and voltage you can get a pretty good idea if a cell is bad or not, but the only way I know of to check capacity is to do a full charge/discharge test.
You might try doing the fast tests on a sample of cells and see how it correlates to the actual capacity.
If the cells were not used much, their capacity should be pretty close to spec if they are not damaged. You can tell a lot about A123 cells from their resting voltage. Anything below 2v is bad for sure. Good ones tend to stabilize around 3.3v. Bad ones also tend to have accelerated self-discharge, so that is one more fairly easy test to do. Charge a bunch of them to 3.65v and let them sit for a few days, then measure voltage.
28850 is a mountain of cells. How did you get that many?