[quote=@MrDidact]
[@Deos Morran] Well I don't think any Turian could out-muscle a Krogan but a clever one can disable them if skilled and quick enough. 

Aegon is good in melee but he's one out of like a dozen people. 

Also keep in mind that the Collectors didn't attack any Turian colonies and that the Reapers were basically a myth until the war happened. Also she's a Lieutenant despite being relatively young and inexperienced in comparison to other Turians. It would make more sense if she got some officer training once she hit 15.
[/quote]

I was going to make mention that weight and physical strength count a lot in a fight. It's why there's weight divisions in wrestling and MMA and what not; a welterweight would be absolutely destroyed by a heavyweight. 

So, unless one were talking about using melee weapons like blades, then it would be more of an equalizer. Even Thane made note that he had to be careful when engaging with aliens because of their superiority in one way or another, plus the fact he's biotic gives him a bit of an edge.