In correspondence with the EE Times writer, he explained via email that Gates, and particularly Mundie, said several things extemporaneously, including mention of TPMs. "Craig sounded that on a bunch of IPsec subjects, he went 'off-transcript' and rambled some."
The writer also found a direct quote in presentation notes stating that "TPMs, embedded directly in chips, provide the means for certificate-based roots of trust." He also said, "Gates used the acronym, but did not spell it out."