The USB has a Type C connector, but it seems like it's USB 2.0 HS. (Scroll to the far right.)
Code:
C:\>adb push update.zip /sdcard/
update.zip: 1 file pushed, 0 skipped. 15.5 MB/s (374892915 bytes in 23.123s) # Glow
C:\>adb push update.zip /sdcard/
update.zip: 1 file pushed, 0 skipped. 110.9 MB/s (374892915 bytes in 3.225s) # Poke3