Believe it or not, and I know 6 months seems like it must be long enough, this gets much better over time. Actually, I was amazed at how things seemed to ease up and smooth out - tight modern tolerances apparently - with the engine as well, but especially the trans. Mine's a '12 Impreza Ltd, now approaching 30,000 mi, and it shifts between drive and reverse in about 2 seconds, just about like any auto trans.But I'd say it didn't loosen up until 15 grand, maybe more - and yes, it had been slow as hell.