I considered that too, the writing seems very contemporary and "youngish", especially with the crossing of swords with everyone when given the chance.....it's possible it IS the real Chuck Yeager I suppose, but one of my first fleeting thoughts while reading the entire page was how young an older guy can seem on the net.
One thing to take note of is that there are a couple of different Chuck Yeager pages on FB, the one linked on page one of this thread, and another large one, with much of the same information and posts even, yet missing some from the one on page 1 of the thread. Perhaps the one with all the cross stuff is a fan page, with someone impersonating him....hard to say as well.