Oh yeah... super huge improvement.
While I don't suggest this for all fish, i generally FW dip all my fish before they go in my display.
Looks like most of those visible ich spots fell off or exploded during osmosis. Keep in mind though, that even though you may not see them, or see few.... there are a ton in there.
Should be fine after 2 weeks, but I think others do it for longer (6 weeks).
I'd defer to other members on their methods.
The important thing is your fish wont die SOON and you have it under control.