Welcome to Discover! Congrats!
They do CLI's just a bit different for everyone I think. From what I've read, they tell most people who ask about it when applying or activating (as in my case) to call back in 6 months or that they might get one in 6 months. I got the "MORE" back in Dec of 2011.
I tried at around maybe 8th month, August I think (don't remember the timing details off hand), got a no, then after a manual review they called me a few weeks later (didn't have time to answer), left a message, I called back, they had reviewed my account and offered me part of the CLI I requested. Went from 6.5k to 8.5k (had asked for 10k lol). Better than never or nothing.