Treecapitator does work on these Taco. However it only works once you have made your way to the heart of the wood blocks, it doesn't work on outer bark. And oh god yes >_< the lag!
*whacks tree*
*eats dinner*
*sees tree still standing*
*sleeps*
*sees tree standing*
*goes off to college for 5 years*
*comes back just as tree explodes into a ton of blocks*
*minecraft ragequits from all the items*
*minecraft deletes your world*
*DONT DO THAT TO ME AGAIN!*
*tries again*
*minecraft uninstalls and wipes your hard drive*
wrath lighter takes care of one pretty quick.