Perhaps these commentators (if I may so dignify them) are concerned about a lack of courage in American Christianity. If so, I agree. We need to grow backbones theologically, apologetically, and ethically. But courage is not exclusively masculine; nor is leadership in general. We don't need more masculinity in the pulpit or anywhere else. We need more Christian virtue: faith, hope, and love. We need more of the glorious power of Jesus Christ to be manifested in female and male leaders: "Your sons and daughters will prophesy." May the Holy Spirit (who is neither male nor female) empower God's blood-bought children to do great exploits for the Kingdom of God (Matthew 6:33). This is our greatest need.
For all my curmudgeonly complaints, whines, rants, and denunciations of the chronically underachieving American church (to which I am committed), a lack of masculinity has never crossed my melancholic mind--no not even once. I have been offended by bad doctrine, terrible art, pitiful oratory, and abysmal music; but I have never left a service thinking, "Oh, it was too feminine!" In fact, much of our malaise stems from male monopolies: those doctrines and churches and parachurches that limit women's participation simply because they are female. Some of the best sermons I have heard were delivered by women. They were not masculine women either. They were Spirit-led, truthful, and pastoral in demeanor--and thank God for them.
"In Christ there is neither male nor female" (Galatians 3:26-28). This means that gender does not place men above women spiritually or vocationally. The Kingdom of God does not advance by an increase of testosterone or because deep voices yell and beat their hairy chests, but as believers seek God, repent, exercise intelligent faith, love each other from the heart, and do exploits of eternal value.