vPro is a function of the processor, not the chipset. That is the processor must support vPro to use it. And vPro and TPMs are not at all comparable. A TPM is not something that does anything on its own; it is used by the FW and/or OS to enable security but doesn't itself do anything.
TPMs are built in accordance with a open spec from the TCG.
Every motherboard I've ever seen ships with the TPM disabled, and many of them that support a TPM don't have it down on the board, it must be installed separately.
vPro requires a fair amount of setup to use, so claiming that it's going to backdoored is really just silly.
While it may be that there are legitimate concerns about TPMs (or vPro), I've not seen any /. discussion yet that seemed to be particularly well informed on the specifics, here.