Due to lack of replies for the whole week it seems that nobody cares about this. Who needs speed in games anyway?

Another interesting article is about using Single vs Double performance in Delphi XE 2: clicky.

After getting Delphi XE 2 Pro, I've done some experiments with speed. Indeed, in certain scenarios using NativeInt is faster on 64-bit, mostly because this avoids conversion from 32-bit integer to 64-bit and allows the compiler to optimize the code better. However, this is only noticeable in certain scenarios and in some cases it increases memory footprint.

I don't understand why they removed support for 80-bit floating-point values (Extended). Also, considering that on 64-bit system intermediary calculations are made in 128-bit (RAX:RDX), I wonder why they didn't include Int128 and UInt128?