Here it is more like optimization:
You can beat if partner holds 8xx KJxxx Jxx xx by switching to a heart.
On the other hand if partner holds xxx KQxxx Jxx Qx you must play clubs.
I doubt very many get to the point of seeing both these successful defenses and actually making comparisons, but now we should make the best choice of defense based on partner's 2♥ bid.
We hold the ♥T so partner can't hold KJTxx, so it's more likely he holds KQ?xx. (I'd assume 3/5 or 2/3 for fit bids generally)
Then it comes much to partnership style but I think partner often holds another card in addition to those hearts. He is forcing to 3 lvl opposite short hearts anyways. If it's ♠H, we are beating anyways, so we should tend to place partner with ♣Q. After all this thought process which might have holes and is foggy at best, we might agree that playing clubs is best after all since it only requires partner to hold cards we already tend to place him with.
No way could I pull that off at the table
![:P](http://www.bridgebase.com/forums/public/style_emoticons/default/tongue.gif)