Hmmm what do you mean by "puffed up" and "filled in"? Are you referring to Myofibrillar and Sarcoplasmic hypertrophy? If so then I agree that if you're training for sarcoplasmic HT then it is easier to lose and more prone to breakdown by the body for energy, whereas myofibrillar HT is longer lasting and will stay much longer once it is built up. I assume you know the difference between the two?
How can you possibly say that my strength is not "real"? lol
If I can lift a certain weight then I am that strong. Simple.
I've been lifting heavy weight for a year now in the 5 rep range and have never taken a break longer than 1 week and I am still progressing very nicely. I think this pretty much discounts your theory doesn't it?
And by the way the 5 rep range is for myofibrillar HT or "filled in" muscles as you call it. So yes, my muscles are "real" thankyou very much.
I'm not trying to make you sound like an idiot mate, but you're doing a good job just by yourself. We all learn new things every day, there's no shame in it!