Read the opening paragraph again to see Mahinda's disclaimer:
"They are meant to be purely for fee calculation purposes."
Now, when did any Govt departmental 'valuations' or 'calculations' ever accurately reflect reality??? Whether they be local council, water rates, valuer general, or whatever...
I would suggest that the figures quoted could be used as a very basic guide to the very minimum one might pay per square metre. In fact no, I take that back...ten years ago you probably could, but I doubt it very much now. $610/m2??? More like $900 - $1050 I feel.
A handy little guide to keep for reference nonetheless!