I have something similar going myself. I brewed a Saison de Garde using 3711 at the end of April, then racked it to secondary and pitched a vial of Brett Trois the last week of May.
I just took my first tasting sample last week and it was pretty boozy (1.080 OG - didn't take enough for a current gravity sample). There was a hint of horseyness (sort of like Sarah Jessica Parker), and not much else Brett character - certainly none of the fruitiness I was hoping for. I'll check back in another month or two, but if there's no new development then I might add in some woken-up dregs from either Orval, Ommegang Biere de Mars, or one of the Brett-aged Allagash brews I have in the cellar (Confluence & Interlude). With beers like this, they're ready when your palate tells you they are.