I am a current FL elite, and as recently as January 11th my WN BPs were printing with A-List even through I only had two segments on WN last year.
But checking in for a flight today I got the back of the bus, so I called the FL elite line. A very friendly and professional telephone rep asked for my A+ and RR numbers, then asked me to hold for a few minutes.
She came back with the good news that she was able to comp me A-List, but warned me that it was only because I flew on WN last year. She said, "It looks like you only flew with them twice, but they let me give it to you anyway." I asked how many segments they would have liked to have seen, or how many I would need this year to get A-List next year, and she said there was no set amount. Just something else to be aware of.