Many thanks for link. For posterity here is the list produced sorted on average:

              avg  std dev
  php         24   41.2894351860362
  javascript  26   43.0588803567294
  c           27   45.4245721268946
  c++         28   45.2483939710062
  c#          30   47.3345103589879
  java        31   48.3674381995104
  python      34   50.9682383156793
  ruby        40   54.1612457522965
  haskell     42   57.6626651794045
  perl        45   57.7285412002331
  scala       53   60.4111999775783
  clojure     59   63.6228517085076
  lua         60   64.9920293705815