I don't know how much was length off the tee and how much was conservative play. Being cubicle-bound, I didn't see anything, but it sounds like her strategy for today was center-of-fairway, center-of-green. That's going to leave some long putts and sounds like she was playing for par, hoping for no bogeys, and possibly to drain an occasional long one for birdie.
Interestingly, despite the additional pressures of competition, the 71 was the same score she shot when practicing with Tiger (who posted a 61 under the same conditions).
It sounds like she was playing not to lose.