Jim,
Far as MS sim, landing on the sim was harder than landing the real thing because of the spacial relation to direction that you do not have with the sim. While working for my private ticket, our
instructor discouraged us from using the MS simulator for this
reason.
However, I think the simulator and a real plane are very different.
Landing a real plane is much more difficult than the sim in a way because of all the physical inputs involved as well as the mental. You just do not experience those skills with a simulator. So I say no, just because you can land on the simulator means you can land a real plane. And as I am finding out, vise versa.

RiffRaff,
My opinion is that the simulator is not a good tool to learn to fly on without at least having an instructor nearby to solo on.

The hardest part of learning to fly is keeping orientation of the aircraft and making correction inputs relative to keeping that orientation. The flight simulators do not give a good relation to this aspect. The simulator will give you "stick" time which you will be familiar with the control inputs without having to look down or think. But without an instructor, you will be taking a greater chance of losing your aircraft if you become disoriented.

If teaching yourself with G2 is your only option, then by all means use it. Depending on your aptitude, you may solo successfully.