I think it was +4 last time it was instantly approved.
Don't think so, as KENILWORTH (
https://btct.co/security/KENILWORTH) is currently +4 and not yet approved. I'm also curious as to this.
Actually I think it has to be positive after the two week moderation, not sure if there is an auto-approval (but can't find any more details on it). From the create page (
https://btct.co/create):
Once the issuer lock is removed, the site mods will start voting on your asset. Your asset will have two weeks to pass the moderation stage.