At the risk of getting shot at, "carb heat on <2200rpm" is in the category of lies-to-children. It's a gross over simplification 'one size fits all' rule that attempts to remove the need for the pilot to think.
Carb heat should be used as appropriate to the conditions, (and by the POH). Tends to be customary to check it on approach 'to be sure' - if the engine coughs and splutters in the circuit, it's less serious than if it does the same when you open up to go around.
Climate wise the damp cold uk climate is more conducive to carb ice; the scandinavian climate is probably colder and drier. It's apparently possible, if the air contains ice particles for carb heat to *cause* carb icing by melting them into water which subsequently re-freezes - that may have a bearing on your friends advice.
As for type differences, scuttlebut is that cessnas are much better at making ice than the warriors. I don't know if that's true, or just an old wives tale (continental engined 150's aside).