Just posting a data point:
2BM (1 IE, 1 Chrome; both InPrivate/Incognito)
Used the 25k, $75AF + $100 credit app link in wiki
2 identical apps with only the type of card changed (1 classic, 1 Northern Lights)
Proceeded on each app with the same timing (clicks were within 5 sec of each other)
Applied 12/22, both instantly approved for 16k
50k miles posted on my account on 12/26 (20k+5k plus 20k+5k)
Received 2 identical letters in the mail on 12/29 telling me Experian score of 802
Still no physical cards
Edit: 2 physical cards received on 1/3. everything went great!