No, because it depends on a lot of things.Is there a list anywhere of games that suffer the worst (or just completely break) from being compressed into .CSOs?
- Your memory stick's read parameters. Given the adapters and multiple manufacturers, this varies a lot.
- Whether you're using a CFW with a memory stick speedup option, and if so if the option is even on.
- The specifics of the CSO compression. There's 9 levels of compression, and optional ripping and downsampling of resources too.