PugsAce: Using topspin in this situation allows for a higher ball trajectory (farther flight) with less roll than you'd expect.
Howdy Pugsace,
I believe you have this one backwards. Topspin will create a lower, more boring ball flight to cut through the wind. Shot hits the green and rolls out farther. You are correct that it will give you more distance though. I can hit g10 PW (115 yd club) with GI SD balls about 120 into a 10mph headwind using full TS. This is assuming level lie to the green and not hitting into an upslope on green. Full backspin on same shot will travel about 109 and stop dead, although I rarely use full backspin into headwind as any miss will come up extremely short.
Regarding SweetiePie's post above about using topspin on driver into a headwind, I don't believe this to be accurate either. I rarely use topspin on driver, except a couple of holes on St Andrews where I know I can land drive on back of a hill to get a monumental bounce forward. In fact I commonly put backspin on driver into headwind on Kia and BPB because you get a ton of carry and ball frequently travels much farther than no spin, and definitely farther than topspin. On St Andrews I rarely use backspin because I want to keep the ball out of the wind and the fairways are also so fast that you get a great deal more run out than you would on BPB or Kia.
If you have to carry a bunker or water on drive, i.e. BPB 4, 6, 7, 9 Kia 2, 7, 10,13, 15 right rough, 16 hill, 18 ALWAYS use backspin because higher ball flight will give you much more clearance even into a big headwind.
Hope I'm not coming across as a know-it-all (certainly not my intent), but these are my experiences that I am 100% sure of. One other certainty is that anytime you place extreme spin on a ball you're increasing your chances for problems if you don't ding the shot as ball deviates much more.