AARP this month has an article about Bill Clinton's vegan lifestyle. They interviewed him for the article. He lost around 30 pounds and has stayed on the vegan diet. He says that he really enjoys the food but misses yogurt and cheese - he doesn't miss meat! He has a once-a-seek meal of baked salmon or an omega-3-enriched egg omelette, so he permits himself to stray off the vegan path that way.
He also says he feels great.