I found this too, from 2000.
http://www.castle-grounds.co.uk/eq/warriorfaq.htm#7
"DEX: how quickly you learn weapon skills; how often weapon will proc; how quickly you learn rogue skills; how hard you hit with bows (per Abashi, dex also increases the chance of critical hits)"
It looks like we have enough info now!! They should do an emergency hot-patch to fix it!!!! This is probably the most top priority bug ever to have ever been found in ever.