I did CBL for only 2 weeks before going on a 'vacation', which has meant doing the prep phase (for the first time as I didn't do it last time). I didn't notice any fat gain. It's hard to say what I gained, as it was only about 3-4lbs so it could be variance on weighing days. I've got a log and I'm starting back loading again on Saturday after a 5 day prep phase (with 1-2 HIIT's a day). I'm under 10% BF, probably around 8% and 160lb so it should prove interesting. I'll be backloading 4 times a week eating mostly... Bread (I know gluten is forbidden fruit, but I love bread so much), rice, sweet potato, energy chocolate bars (made with glucose), the usual baked treats, cookies and pizza... I will be looking to gain at least 7lbs and hopefully up to 10lb in about an 8 week period so keep an eye on it and it may satisfy your need for results!
Curious though, why do other peoples results matter so much? There's testimonials in the book... do they not count enough? If the plan isn't working for you, maybe you should look at what might be going wrong. There might be 1 little thing throwing things off balance.