Ultimately, it's not for anyone but you to say. I have seen posts on these forums from people freaking out because they drink a bottle of wine on Fridays and Saturdays and they just can't quit - and I was thinking, damn if I could drink just a bottle of wine on Fridays and Saturdays I wouldn't even be here! But for that person, it was a real problem.
So, bottom line - it's not about quantity, it's about quality. If your life is better now than when you were drinking daily, then it's progress. If you think drinking, even at reduced frequencies, is causing you more problems now than it was when you were drinking daily, then no progress has been made.