PS started blooming for me June 6 but that was the prebloom scape. I didn't keep track of when the other scapes started to bloom but they were at least a week later.
I would definitely call PS extra early since the only other cultivar blooming at the time was Butterscotch Ruffles and it always is extra early for me.
None of my other daylilies from Maryotts have bloomed yet. I think Griffin Miller might tomorrow though. That would make it an early for me since several of my early dips have started blooming in the last couple of days.