Blowouts

In the first 11 games of the CFL season, 6 games have been decided by a margin of 20 points or more. What's happening?

Is this an anomaly or is there something fundamental to the game that is causing contests to tilt in one direction with leads quickly becoming insurmountable? I wouldn't think much of it had it not been for two teams (Calgary & Saskatchewan) having already been both a victim and victor in different blowout games.

Are defenses becoming that good that they can shut down an offense, create turnovers and never even give the opposition a chance once drawing first blood? There appears to be an absence other than 2 or 3 games of lead changes after the first quarter.

Maybe its just that its early in the season. Teams like Saskatchewan and Calgary who had blowout victories in the first 2 weeks may have had obvious weaknesses exploited by teams who had the benefit of video history in preparation. Hence they fell victim to blowout defeats.