Applied got instant approval.

Have:
AMEX GOLD charge card 2001
"old Amex Blue" 2001 with $35,000 limit (this one is membership rewards points only)

Applied at 9am EST. I logged into amex website at 1pm and they had dropped the CL
from my BLUE down to $18,200. So hopefully this means I get a $15,000+ CL on the new card.