Very interesting thread to me. I've been growing new spuds for many years and not familiar with chitting.
One thing that would concern me about chitting would be encouraging growth (above ground) too quickly for freezes/frosts. I plant my seeds well before the danger of freeze/frost is over. I have to because here on the Gulf Coast it gets very hot very quickly...by late May, new potatoes have to come out of the ground or rot.
So, I try to plant as early as possible to get a root system started and have no more above ground exposure than necessary until danger of freeze past. Along those lines, I plant at least 8 inches deep and hill up as soon as new shoots start coming forth and continue to hill up through harvest.
I have had up to three freezes once on the same crop with above ground tops and they survived but did have somewhat lower production. In a good year, I'll get 12 to 15 pounds of harvest per pound of seed potato, but average about 10 pounds. The three freeze year, I got about 7 pounds per pound of seed. I started this year already with 20 pounds of seed spuds in the ground. 200 pounds of new potatoes generally does us for most of a year until I can get the next batch growing.
I absolutely love growing potatoes and it has been a family tradition around here for 50 years or more.