Am doing it on my hunter (beast spec) herb/alch toon and I'm currently at skill 34 - you're supposed to mostly get just 2 pieces per dig under skill 100 if memory serves but I've been getting non-stop 3-4 pieces every dig today.
I'm working herbalism as I'm doing archeology (if I get near or overfly a skill zone I gather herbs) and I'm wearing Herbalist's Gloves with the +5 herbalism chant on them.
Now it could simply be a coincidence that I'm having such slammin luck or maybe there was a undocumented patch which upped the fragment count pre-100 skill but I swear it's been every dig today - 34 points, 96 fragments (did 10-15 points previously).
Will update my frag totals later to see if my luck holds (probably just jinxed myself if this was simply a streak).
Edit - at 64 skill and had my first non-skill up - 190 frags not counting the ones from that one meaning I was averaging three frags per dig. Since two is supposed to be the norm for those 64 skill points that might mean that gathering chants/buffs MIGHT help get more frags - will test later with my engineer who's got a mining helm and chanted gloves too.
Edited, Dec 19th 2010 1:33pm by rusttle