Congrats!! I was in the same boat. I've had my little guy for almost 2 weeks also and I finally saw him drinking from his dripper about 15 minutes ago. Talk about a stress reliever right?
So i'd say 2 weeks is the cut off for shy drinkers? Lol! I have had my dude for a little over 2 weeks and saw him lick a few drops while I was misting him. I was also worried and is such a relief.