When does Google Android developer console statistics updates ?
According to my experience:
1-The developer console statistics updates every day somewhere from 5 - 6 AM PDT ( 12-1 PM GMT )
2-The lists ( ex: Top new free list) updates many times in the same day, sometimes i tracked updates every 6 hours and the main update is somewhere between 6 - 8 AM PDT ( 1-3 PM GMT ) and also 6-7 PM GMT
Note: Earlier before i thought that it is once per day, but recently i have initiated a campaign which provided hundreds of new installs/day and i found my app moving down the list many times in the same day
Note: consider daylight saving time changes