Strange Behavior with RegionPlot

Consider the following code.

RegionPlot[Print[{x, y}], {x, -2, 2}, {y, -2, 2}, PlotPoints -> 2]

{-1.996,-1.996}
{RegionPrivateRegionVar[1],RegionPrivateRegionVar[2]}
{-2.,-2.}
{2.,-2.}
{-2.,2.}
{2.,2.}


My question is: what is RegionPlot doing to create the first two lines of output? I do not understand why the first sample point is {-1.996, -1.996} and why the second sample point is {RegionPrivateRegionVar[1],RegionPrivateRegionVar[2]}.

I am running this in Mathematica 9. I do not recall this happening in an earlier version.

Edit: I changed the code above to give a better minimal working example. I leave below the code I first gave along with its truncated output.

myFunc[pt_] := Module[ {bool},
bool = Sin[ pt[[1]] ] > 0;
Print[pt, bool];
If[ bool, Return[True], Return[False] ];
];

RegionPlot[myFunc[ {x, y} ], {x, -2, 2}, {y, -2, 2}, PlotPoints -> 2]

{-1.996,-1.996}False

{RegionPrivateRegionVar[1],RegionPrivateRegionVar[2]}Sin[RegionPrivateRegionVar[1]]>0

{-2.,-2.}False

{2.,-2.}True

-
I can confirm that this doesn't happen in version 8.0.4.0 but in version 9.0.0.0 - no idea what changed... – Jens Feb 8 '13 at 3:10
As a clue this resembles the behavior of regular Plot[] which first evaluates the function with a numeric argument, then a symbolic arg, followed by the remaining numeric values. – george2079 Feb 8 '13 at 23:23