Got card September 19th. It was second citi approval in about 60 days. 7500 to 9000. Highest CL besides Amazon store card.
Both citi rewards, and citi aadvantage took just over 2 months to get cli. Both times they were on first of the month, and 1500 each time.
I basically put 2800$ through this card in first 50 days, and use it once in awhile. Same for citi rewards card(I now only use that for my 1$ free trials mostly Experian.com)