While I will fail to provide you with a specific answer, I have a common sense test! Any diet must answer yes to all the following questions to pass:
1) Is it balanced?
A diet that recommends too high (or low) of any one macro-nutrient (fat, carbohydrate, protein, etc) doesn’t pass this test.
2) Does it allow moderation of all foods?
A glass of wine? Sure. A bottle every day? No. Ice cream as an occasional treat? Why not. Ice cream as a daily meal replacement? No.
3) Is it something you could sustain long term and remain in good health?
The best diet is a healthy one you can maintain for your entire life, not a restrictive fad you follow only temporarily.
When a client asks a diet related question, my first response is to ask them if it passes this test.