Understand all that. But on the anomaly point - football progresses, and while you can of course say that our league position is a divergence from recent years I don't think that you can look at past seasons to assume that this trend will continue for Arsenal this season. The evidence is before our eyes. Arsenal is clearly a team on an upward trajectory and extrapolating from our performances this season suggests that we will finish in the top places. Its a question of belief, really. Yes we need to play teams that may be competing for top four, but we have already beaten Spurs twice for the first time in 8 seasons; Liverpool; Chelsea twice in the last year. We have found consistency that we lacked formerly and there is more reason for reason for optimism than for assuming we will lose against all the teams you have mentioned.
What I take issue with is the suggestion that we are only where we are because the traditional top teams have been inconsistent. Again, football evolves and with the money and talent flowing to the EPL other teams are undoubtedly uppoing their game, and this is to an extent why we are seeing 'anomalous' results week on week. So far, we are the team that has weathered this storm best.
I agree that we may fall short of the title - and the main reason for this (if it happens) will be fatigue and injuries that mean we can't play our first 11. But based on the evidence of this season my prediction is that the inconsistency of our competitors is more likely to continue than not.