Noob here. Just purchased a 2011 WRX and the first thing i did was come here and look for this exact question. After reading about how lean our cars run and how dangerous it is, or people believe it is, it almost leads one to want to use AccessPort or some other tuning method to normalize the AF ratio.
With that said, running modified software is grounds for SOA to void your warranty if something does happen. Catch 22.
Bill, you said that you have not seen code in the ECU that would show log the number of flashes. Can you tell us what years, or ECUs, you are basing this on? I would believe that you guys have good knowledge of what goes on in our ECUs, so if something was there, you'd notice it.