I know people become concerned about me (my boss in particular) when i was struggling about 6 months in. At that point I wasn't really working on my recovery. I was just staying sober and checking into AA once a week to stay accountable. I hadn't really built up any tools for dealing with life sober at that point and things were starting to get to me (bit of an underexaggeration there). Now i can see that i was, for want of a better phrase, 'white-knuckling' sobriety.
Nowadays people who've known me at work a while say they notice change but positive stuff.
BB