I too had my first daylily open this past week! It was my old reliable, Butterscotch Ruffles.
BR is always my first daylily to bloom. Usually it's the only one to bloom for weeks before I see any other scapes. Not sure if it was the harsh winter/ cold Spring but I'm already seeing scapes on other plants. Or, it could be because last Fall I finally started to fertilize my plants on a regular basis. Either way, I'm ecstatic!