Kyle, everyone at PTC basicly does the stuff I had you start with. Seeing as a KB handle is lower than a BB, as long as they can reach down and pick that up without rounding the lower back, they can start by deadlifting KB's, starting at the 8kg.
When they can deadlift the 64kg KB, like you did, they are then introduced to the bar. A 64kg KB is harder to deadlift than a 65kg bar. The girls quickly find this out.
All the while, they perform cannonballs and swings, so when they get to the bar, the PC has had plenty of direct work.
Its not unusuall, in fact its normal, to have a girl pull 100kg after just 4 weeks of lifting, depending on how often they train.
A 100kg deadlift is not impressive, and I'm not being a smart ass. More girls pull 100kg at PTC than dont. In fact, besides the two 14yo and the 60yo, they all do.
Same goes with the guys, they all pull over 140kg, including the 60yo guy.
As long as you prepare by training the PC first with more direct exercise, and you put some effort into deadlifting, these numbers are very achievable.
Now, one other thing we do is high reps with KB deadlift. Nick has done 84 reps with the 64kg KB in one set.
Most of the girls can deadlift the 64kg KB x 20. We do train the PC with high reps, just not with the deadlift.
Hope this helps