According to Engadget, the HTC Butterfly users in Taiwan have started receiving Android 4.2.2 update comes with Sense UI 5. The update with 551MB capacity will be divided into two packages: the first work package preparation system, and the second package truly put the "Butterfly" on Android 4.2 and Sense 5. HTC had previously said that some of the special features of Sense 5 will appear only on the One, but the news BlinkFeed track is not one of them. To check if your computer has updated or not, you go to Settings> About Phone> Software Updates. More likely Butterfly in Vietnam we will have to wait for a few more days in each update, but anyway between HTC also promise not to abandon this model. No information about the update and Sense 5 for One X One X.
Source: Engadget