Throughout my career I consumed most of my daily protein through supplementation and I continue this practice today. (My favorite protein supplement choices are VP2, Muscle XGF and VyoPro Protein Bars).
I've always preferred getting most of my protein through supplement sources for 3 main reasons: quality, convenience and ease of measuring nutrient totals.
This is not to say that one can't get more daily protein through food sources this is simply what has always made the most sense and worked best for me. The main thing is that your nutrient total goals are met at the end of the day regardless of the sources you choose.
Before you stop and say the only reason I do or say this is because I'm sponsored by AST Sports Science, I say "know your facts before you accuse me of simply being a marketing tool for AST." Long before I became sponsored by AST Sports Science in 1999 I paid for all my supplements out of my own pocket for many years and I still followed the same type of pattern of getting most of my daily protein through supplementation. I always have practiced exactly what I preach and have never appreciated the insinuation that I lie about what I do to sell products.
I was recently asked if I thought the inclusion of so many meals through supplementation was a healthy way to go about it and I absolutely think it is as long as you add extra fiber in your diet with the inclusion of lots of green crunchy vegetables.