I don't personally find it that important what temp you bottle condition your beers at myself. Whether its an ale or lager yeast, as long as its warm enough for your yeasties to do their job properly.
My reasoning being that it's a relatively small amount of fermentables that your adding at that point and is unlikely to make a noticeable difference to the flavour even if it was bottle conditioned at 5+ degrees higher than primary sat at.
David
:icon_offtopic: On a side note I had my first Fat Yak last night. They have it on tap at the orient (in the rocks). It's an alright beer, plenty of flavour.