As I said, I'm not a stats expert, so I don't know if a sample size of 13 years is large enough to identify an aberration. The word aberration is being tossed around here without too much concern for its actual technical meaning. I'm not even sure why it even matters that we determine whether 2012-2014 or 2013 are 'the aberration'.
All that aside, so as not to duck your question, in my opinion, yes, the two division titles and the two last place finishes would meet the very informal definition of aberration I think is being used here.