I think it is a coincedence, just my opinion though.
The main reason out defence was so good those 1st 6 games was our scrambling d, that is what has been missing and it is hard to keep going all year, you will be broken eventually
even when we were letting in stuff all, it was still worrying me that we didnt come up to meet the defence much, and i still have that concern. Teams are gaining easy metres and are allowed to set up their plays under less pressure
In contrast to that look at the new Tigers d, they are moving up aggressively and are reaping the benefits the past 2 weeks