You forgot to add the most important CDP criteria.1911s are the only pistol who get their own class which is CDP. It's kind of a double edges sword too. You all have the same pistol and caliber so it's equal, you aren't shooting a big caliber with heavier recoil and going against someone with say a 9mm tha tis light recoiling. But that is only an issue if you are not use to the recoil.
At the same time though at the club where I shoot someo f the best shooters are in CDP so for me as a new guy to IDPA it's a severe disadvantage. I get my *** kicked even when I do good. But I don't really care anyway. It's fun and decent practice.