Well to start I would be questioning the depth of the concrete. 60 days would say me that it has only just set if the concrete is 60mm deep as it takes 1 day to set 1mm (some people say dry out).
This information should be obtainable from the builder. (my bad I misread the fact the house has been ready for two month so concrete should be ready to tile)
After finding that information out, tiling straight onto it would be out of the question in my opinion. Does the house need time to 'settle' ?
I would be belt and braces approach all the way with flexible adhesives and grouts (BAL, Weber, Mapei) also using a decoupling membrane such a Ditra Matting or Durabase to take the strain of any lateral movement.
Has there been any talk of undertile heating ? If so you will have to research your tile to check its suitability for UTH.
(ps, always back butter (skim) these tiles, as they need a good bond and Rookery is correct, a 2 part is best for quartz/resin tiles.)