Ami,
This is awesome info - thank you so much for sharing.
I am a believer of the 'cold treatment' - as my laundry room where I start tomatoes and peppers is naturally cold (not heated), the night time temps are ideal for the cold treatment, so whether I wanted it or not, I have been always going through the process
For folks who tend to over water the seedlings - beware that cold and wet is not an ideal combination for the root system of the young plants. Been there in the past, and lost/stunted quite a few transplants myself...
Tania