I thought that evaluative might underexpose the area covered by trees, but then you maybe right coz it was cloudy that day. Thanks for the link, shall go through it.
EDIT: I just went through the link and it said that Evaluative mode mesures light from all the zones but more emphasis given on the AF point. And Center Weighted metering is similar to evaluative mode but emphasis given to the center zone, not to AF point.
In this case it doesnt make a difference if I had used evaluative mode for my 2nd and 3rd pic as my AF point was in the center itself. Did I get it right?