I realised I didn't finish my post before. It should have read:

I know some definition of the muscle groups may need some displacement enhancement (come on all you people with Z-Brush!), but I think it's also possible to push those scale and morph dials to extremes that do end up distorting Apollo's mesh and so make his physique look unnatural (as it would be with all figures - moreso I'd say). Does this mean that his muscles can't look realistic? Not in my opinion. 
I hope my last renders go some way to illustrate this.

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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