@ehBeth,
I've made them twice; first time was perfect, at least in memory. Second time I was being lazy and made all the dough but only used half and froze the rest. Then that 1/2 batch of dough didn't turn out bialys as chewy as I remembered. Not sure what I did wrong, maybe not enough kneading.
When I thawed the rest of the dough from the freezer some weeks later, I added a smidge more yeast to the big lump of thawing/thawed dough, just in case, and those bialys turned out to be chewy again, simply perfect.. better than any I've had from a bakery (though New Mexico is probably not the center of bialy making bakeries). Maybe it wasn't the smidge of yeast that fixed the last half of the dough, but the added kneading. Chewy is important! Anyway, chewy or not, they still tasted good each time.