I'll try and find the article, 3 pages, but it talks about the coincidence of tranny failures after flushes b/c people don't change the pan filter before, AND AFTER a flush.
Scenario 1- Regular customer goes to Jiffy Lube and asks for a flush. They accept, flush old fluid out and put in new without changing pan filter. Once that filter is saturated it cannot function at all, period. This is what leads to most premature failures.
Scenario 2- Customer asks for pan filter change and then the flush. This is better but the article still states that you should change the filter again (maybe 1000-3000 miles) because a flush with ALL NEW fluid will break up any loose debris and clog a filter early.
Scenario 3- Repeat #2 above and then change the filter again and you should be A OK.
FYI- I didn't write the article, it was from a recognized filter association but I will find it and post the link.