Board Thread:The Flash discussions/@comment-9346948-20160511000438/@comment-27700324-20160511160120

Steven Bomb 17 wrote: Joe...Wally's powers will take longer then a few hours to work. How long was it for Barry? A day (not counting when he was in a coma) Well he woke up, Cisco and Catlin calmed him down. Enter Dr Wells with a little exposition, all that and him walking to Jitters probably took an hour. Iris saw Barry, then they said some words for a few seconds and.. FLASH.

So yeah, what Barry discovered in an hour is what Wally will find in a day, as in the next episode.