Update: Here is a class breakdown of the killers. Note that the single largest majority are killers that didn't use any class skills in any of the recaps, and hence couldn't have a class identified. The two pie charts show the class contribution to total kills, and then the class breakdown of unique killers (killers can have multiple kills). The two bar charts show the average damage that each class did per death (total class damage/total number of class kills), and the average number of killers per death that a class contributed to.
Some general statistics:
Average number of killers: 2.4
Average killer rank: 17.2
1/3 of the recap durations were less than 2 seconds, 1/2 of them less than 3.5 seconds, and 2/3 of them less than 4.5 seconds
Average damage per recap: 21.3K (health with food is ~22K)
A poll was posted about Stamina vs Magicka, and I thought it might be interesting to look at the data from the perspective of Magicka and Stamina based killers. What was done was to look at each unique killer, and classify it as either Magicka or Stamina based on the highest damage source, and compare the relative numbers of each type. Then look at the kills and damage done by each class of killer corrected for the total number of that type of killer, in order to try and look at the effectiveness of each type regardless of their population size. (also updated the OP)