While it may not be within the 90 days HTC originally promised, product manager Mo Versi announced on Twitter this morning that the Verizon edition of the HTC One has had its 4.4 OTA update approved by Verizon, and that it will begin rolling out shortly.
HTC One Verizon Owners! We have received technical approval for the OS 4.4 + Sense 5.5 update today. Expect the OTA out shortly. Thanks!