I'm not comparing the two but Washington was just an example of someone who said one thing but ended up doing another. Also, as I recall, Fox may have said his plan was to play two years but that was before he was injured and lost one of those years. If he comes back after next season that will be his 7th year in college. I'd say his chances of changing his mind about that are pretty good.
Look, what people may say about their intentions is subject to change. A little over 2 million people in the USA swear "for richer, for poorer, until death do us part" each year but a substantial percentage later change their minds.