Other than the 5GB transfer test, a real-world assessment of an SSD's performance can be done by comparing application load times.  The first application test measured Windows 7 boot time from the boot loading screen until the Aero desktop has been fully loaded and there are no busy icons present.  All test drives had a cloned Windows image.  The second test measures Adobe Photoshop load times from the moment of launch by clicking on a desktop icon until all the modules have been loaded.

Comparison:

ADATA XPG SX900 128GB Application Load Times