stereotypes exist for a reason. Generalities exist for a reason. That reason being, they are true in the majority of instances.
The book you are talking about is dealing in generalities, which will probably be true in the majority of instances. However, another generality is that generalities have exceptions. In otherwords, they may be true in most cases, but usually they aren't true in all cases.
However, I do believe that there are set gender roles that were established by God and that people are designed (even if they don't feel it or realize it) to fulfill those roles.
The manly characteristics in that book describe me very well. I've been like that since I was a kid, I've always wanted to be that.
Not every one does.
However, another reality is that what is best for people is not determined by what they desire or what they think they desire. A lot of human desires run contrary to what God has destined us for.
For example, I have a good friend who in some ways is exactly like me, in other ways he has tried to be exactly the opposite of me (not for the sake of being opposite but because it was what he wanted to be).
I've always wanted to rescue the damsel in distress and get married to the princess etc. I've always identified with the hero, the good guy, etc.
He on the other hand always cheered for the villain and wanted to be the villain. I know him well, and for a long time. He is really a very nice and even kind caring guy. Yet his image of himself that he promoted and desired was that he didn't care about anyone, only served his own interests. For a long time he insisted that he never wanted to get married, and never wanted kids specifically because he was too selfish for that etc.
Yet as he has gotten older and lived more.. he has begun to change. In fact in the last year on a few of those things he has done a complete 180. The reality is his desires not only didn't match up with what was best for him.. what he thought he desired wasn't truly what he really wanted. He has begun to discover that as he got what he desired and found out that he wanted something else.
as to gender roles in the Church being influenced by the world... I think it is more true of women than of men. Women's gender roles in the Church have been completely re-invented based on modern, western, society.
For men, the whole "nice Christian guy in the sweater-vest" is often a sickeningly real stereotype. However, I don't think that comes from the world. I know almost no guys in the world who are like that.
That one, I think, was invented by the Church. I think the modern western Church got into a mode where it adopted a passive and feminized view of men and manhood. This was partially due, I think, to the touchy feely and very feminine way that the Church presented 'relationship with Jesus'.
Along with that, hand in hand, the Church spent a lot of effort portraying much of the fellowship of men as being sinful. When I say that I'm thinking of the typical things that men do to bond and enjoy friends... You can't go to the pub and have a beer with the guys, you can't get loud and rowdy over a sporting event, you can't play rude jokes on each other, you can't laugh and talk freely.
Many of the Christian guys I know who are more from that mold have few or no close guy friends and they have little or no social outlet with other guys.
Most of the Christian guys I know who do have good friendships with other guys and are active with other guys are the ones who are more "rough" around the edges.
In my opinion there is a certain amount of unreality about the image of 'men' that has been propagated by Churches, and this is one of the reasons that in general men attend Church at a much lower rate than women do.