After reading your suggestions and doing some homework of my own, I came to the conclusion that Peterson was unreasonable. I'll be using this tuner for precicely one thing: setting the intonation. I have 2 other tuners that are plenty good enough for routine stage tuning.
So, after looking into a great number of tuners, I settled in on the Korg LCA-120. It's plenty accurate for intonation. I found one for $60 shipped, so it fit into my budget, too.
After getting it in yesterday, I set the intonation on the three guitars that needed it. It worked great. So, this is basically a heads-up that there is a reasonably priced alternative.