Yes, the website response time is dreadfully slow today. But so far, I have no complaints about ebook availability really. I've seen the total number of ebooks available through the local library consortium jump up by 400 in the last month. I don't know if that's noraml growth for them or some type of end-of-year infusion of funding. While there was a wait list for some of the books I wanted, they became available for checkout pretty quickly after I put them on hold. Sooner than I would have expected based on the wait-list numbers. I also have a pretty long wishlist and there's at least a dozen available for checkout right now if I wanted.
Hopefully, Overdrive will beef up the servers to keep up with the growth. Other than that, I'm a happy camper right now.