While I am a huge advocate of equal treatment- I really am a huge advocate of equal treatment.
If all male units really do outperform in measurable tests- and I would be up for additional testing- then really there shouldn't be any question of integrating.
If we were to use the same standards that we do elsewhere in our society, the disparity would largely be the product of the testing method.
We would approach combat from the same perspective that the SFFD approached firefighting when seeking to increase pass rates for female candidates: don't put the same priority on time that we do on task completion. For example if a woman can pass the physical standards testing if given more time than their male counter part, then perhaps the time period is gender bias by being unnecessarily short. With 'necessary' being the time period that women can complete the task in more readily.
Or perhaps combat focuses on the wrong muscle groups. Its possible that it puts too much emphasis on upper body strength as SFFD found when assessing fire fighting. Why not make combat and combat training more about muscle groups that women might not be at a disadvantage. Or as the San Francisco Chronicle outlined in its review of firefighting testing standards in 1912, return to the combat requirements of the 1st world war.
And is marching really a sign of job performance in combat? Don't we have humvees and helicopters? Also, do they really need to carry packs that are 100lb? Aren't there lighter materials? The pack size itself might be a form of gender bias. As if it were lighter, women would be less likely to be injured.
I mean, if we were applying the standards that we use elsewhere.