Got to agree with you Mrs O. Over the years I have gone through spells where I have literally force fed myself protein and at other times paid no attention to it whatsoever (eaten 'normally', 3 square meals a day) and I didn't notice any measurable difference between those times in terms of strength or muscle gain.
In fact I measured my macros the other day and my protein was quite low (125g) yet recently I have gained a fair bit of lean muscle without really foucusing on it. Personally I think protein is much less important than we are led to believe.
There's a lot of studies out there that show that the less you take in the more efficient your body becomes at using it and anything above a certain amount is excreted anyway. But who knows?
As most of the studies done these days are probably funded by supplement companies (and I'm a cynical old bugger) I imagine that it's in their interest to exaggerate the importance somewhat.
I must say a little piece of me dies everytime I read a first post by a beginner saying that they've bought their protein powders and supplements and belt before they've even chosen a routine or touched a weight. Cart before the horse perhaps?
OP if things weren't progressing for me I'd be looking at lots of other variables before worrying about the specific type of proten I was using.