In essence, I totally doubt that the US will ever project strength directly protecting Taiwan (along the terms of what we did to Kuwait when Iraq attacked; or along the whole Vietnam scenario). If we go to war with China i think it will be exactly on our terms, not to protect an ally like Taiwan.
Aside: I think to protect Japan we would go to great lengths, but something tells me Taiwan will have to do with very little assistance, most of it being condemnation for Chinese actions.
When have we ever gone to war on "exactly our terms"?