I want to thank Rooster2 for figuring this out - and posting it.
I have a 2000 Outback I bought with 65,000 miles about 3 years ago (now 120,000 miles). I've been dealing with what I would call a moderate to severe case of delayed start when trying to get into drive from park for about the last 2 of those years. With a mechanic I trust we've tried different things over the past year - including flushing the sytem and adding an additive -but I don't know what it was he added. It did not really change anything. I told the mechanic I wasn't going to take it to a tranny shop as long as I could reasonably get it going in gear. I really didn't feel it was a bad tranny, and neither did he. It always ran fine - as long as I could get it into gear.
It had become bad enough that I would not let my wife drive the car now for about a year - I didn't want her stranded somewhere. And I was careful where I parked - I always wanted to point forward so I didn't have to back up and then try and put it in drive, and I usually tried finding a spot rolling downhill. Also wanted to be away a little in the parking lots. People tend to look at you a little strange as you sit there and rev the engine before moving...
Anyway, I read this last thread last night, and went to the local auto store and bought some Trans-x and Valvoline maxlife at lunch today. Completed the drain and fill tonight, and I am completely amazed. It just doesn't seem possible that something so simple can fix this, but at least right now it has. Again, I am just amazed. I'm going to take the empty can of trans-x over to my mechanic tomorrow. I hope you guys keep updating how long it continues to work for you. Thanks again.