Originally Posted by dsimon
I do not believe that AA or NW will comp equivalent CO tier status. AA, however, will offer a Gold or Platinum Challenge for a short track route to elite status.
FewMiles Unofficial Guide to American Airlines AAdvantage would be an excellent starting place to read about AA's challenges.
In February AA comped Gold for my CO Platinum status, and then I made Platinum with a Platinum challenge. I've found AA to be a terrible airline though, so have flown less than 10,000 miles on AA, having returned almost entirely to CO.