..yes because if our pilots were concerned about the potential performance of their adversaries (skill / experience / aircraft / weapons) and planned and fought accordingly then the Argentinians would have been entering the battle with similar thoughts in mind.
I of course have absolutely no idea as to which side would have had the most up to date and reliable intelligence as to what the other sides capabilities were - but if the G (as I understand it that was the Sidewinder model we 'should' have had) had a certain performance does it explain in any way how the Argentinians fought - supposing they had no idea that we had L with different capability....?