Im not sure why your acc would not differ from 20-40 but jump 12% from 40-60 and then stay the same 60-80. Even the distance = acc suggestion would not account for that sort of behaviour.
Hopefully someone will figure out the correct formula for DEX = ACC
Edited, Oct 13th 2010 7:17pm by TheMightyX
Its a possibility DEX doesn't directly translate into ACC but could be a percentage modifier to ACC.
The amount of DEX needed for a bonus could increase as you gain rank, effectively making a hard bottom cap.
Example (completely made up):
@lvl 14 40 dex is the hard bottom. Every +10 dex increases ACC by 5%.
20 dex = 0 bonus to accuracy stat
40 dex = 0 bonus to accuracy stat
50 dex = 5% bonus to accuracy stat
60 dex = 10% bonus to accuracy stat
These type of mechanics could explain why there was no difference in the hit rate when going from 20-40. Also why gear seems to make such a large difference. If base stats are increasing the effectiveness of your gear by a percentage, then better gear gets a larger benefit from your stats. Edited, Oct 14th 2010 7:16am by Zerrius