Experian is typically the bureau that will show updates the quickest. I'm not sure why TransUnion and Equifax are so slow.
What was the exact date your wife requested to add you as an AU? For those cards, when do they typically update on her credit? I ask this because say your wife requested to add you on July 20th, but her bill is due on the 12th of the month and it updates to the bureaus on the 15th. Sometimes with AU accounts, the creditors will just include you on her next bureau update meaning you wouldn't see it on your credit until August 15th which is when it would update for your wife again? Does that make sense?
