FSX Demo has thermals !?

Hi all,
I've just read on another forum that there are thermals in the demo of FSX. Those thermals can even be displayed via the menu (don't remember the path), they are shown by some kinf of 3D spiral (same kind of object as the green arrow for missions, I supposed), black because the textures are not there.
The info was confirmed by one of the ACES guys.
Did anybody tried thermal soaring in FSX ? The ACES guys gave no details at all on the modelling of those thermals...
I've just read on another forum that there are thermals in the demo of FSX. Those thermals can even be displayed via the menu (don't remember the path), they are shown by some kinf of 3D spiral (same kind of object as the green arrow for missions, I supposed), black because the textures are not there.
The info was confirmed by one of the ACES guys.
Did anybody tried thermal soaring in FSX ? The ACES guys gave no details at all on the modelling of those thermals...