We test everything here- all in-process testing, micro, disintegration, content/blend uniformity, etc.- speeds up the process dramatically. We run 15-20 batches a month, and it would be very cost-prohibitive to outsource our testing, if we wanted it to be done correctly and by the letter of the law (key point, this is VERY important to us). Micro alone takes 3-5 days at most major facilities, plus shipping time there and back. Doing it here helps big time, as does all of the other testing we do on every batch, plus incoming raw materials and excipients.
To Patrick's point, I don't think a lot of companies test correctly, if at all. I hear a lot of jawboning about cGMPs, but having set up this type of facility- I can tell you that it is a huge pain in the ass, is VERY time-consuming, and it is expensive (but worthwhile). I may be wrong, but based on what I have seen around the industry, things aren't getting done correctly. And to Patrick's other point- that is reality