The rebloomers are a hit and miss here, for sure.
PEGGY SUE took a couple of years before I saw any rebloom out of her, and then it was only for a couple of years. It could probably use dividing.
LUMINOSITY, SDB BLUE OASIS are sometimes rebloomers here, but at odd and unpredictable times.
GOLDEN IMMORTAL has rebloomed at least a few years here, despite being in a rather shady bed.
I agree that some of the rebloomers do so at unfortunate times. SNOW DAY has bloomed here in January or February, if memory serves (I can't find pics). While that sometimes works here, I'm sure it wouldn't in other climates.
For sure, the rebloomers are lagging in beauty when it comes to form.
