You guys obviously don't understand shaft "loading" and "unloading"...google it, you will be enlightened.
Here is a page that explains it pretty well (no, I'm not spamming
)...lots of others sites with similar info. Also, look at this well publicized TW commercial shot with very high speed camera...stop it where you like.
Shaft unloading is real, fellas, not just a camera trick or "artifact"...it's not so pronounced with Tiger but that's because he's good and he is using the best equipment fitted to him...but even the best has
some shaft unload, i.e. forward flex. You want it under control but your distance would suffer significantly without it. It's more pronounced with the driver and fairway woods because the shafts are longer and there's more mass at the end of them...irons have shorter shafts and less mass at the head and are more about controlling distance, not maximizing it, hence less shaft unload.
Shade