@thecityman and @Jwsemo, thanks for replies. I did some research after I posed the question. Namely on the stages on sweet corn development. Corn goes from a vegetative state to a reproductive state. The R state begins with the tassels dusting the ear silks with pollen. At the R2 stage, the kernels are white and look like blisters, which my wife confirmed.
We tasted it, and it was pretty sweet, and the kernels were decent sized. We only pulled one ear off the stalk, and inspected three others by peeking inside. Don't recall the fluid being clear or milky. Most of the silks are still kind of purple and moist, although some are turning a light brown.
The next stage is the milk stage, when the kernel starts to turn yellow, which I assume is when the corn needs to be picked? Because the next step is the dough stage, which means the kernel becomes more starchy than milky. I would assume it would be too late then to pick. So, I guess we're still a week off from time to start picking.
I did read about keeping a sh2 supersweet corn like HS isolated from a regular (su) sweet corn like SQ or the HS will produce more starchy kernels. I will say that Silver Queen is maturing later than the Honey Select. DTM for the white corn is 92 days, and for the HS is 79 days. The SQ just started its tasseling and pollen drop just a few days ago, whereas the HS is done with that. So, it may not matter. And then I saw Kevin's comments about HS not being too susceptible to these cross pollination issues.
Anyway, there's nothing we can do about it now, I think they'll be OK. I do find it interesting that ears start to form before the pollen starts dropping. I, and my wife thought that the pollen drop causes the ears to form when it falls into the crevasses in the leaf collars.
Do you guys usually get two full sized ears of HS per plant? I wonder if this is true for most of these hybrids. Our HS and SQ are showing two ears max.