I can't say what my experiences are just yet since I am just getting ready to switch Rosie over tomorrow or Sat but I have done a ton of reading and most everywhere says to just do a cold switch. Considering she has been with a friend of mine since Feb and she has been eating everything from pizza to purina and I would rather not give her any more of that I am just going with the cold switch.
It is other raw feeders who say cold switch, the website I bought my food from says a slower approach similar to how we switch from one hard food to another and the girl at the pet store here that sells it says don't start off with meals but give little bites all through the day for a few days until her tummy acclimates.
Curious to see what others here have to say on the subject.