Yes, but with a limitations.
I don't know in other USBloaders, so I'll speak only for USBloaderGX:
In order to register the play time, the Wii write a temporary file when you launch a game from the Disc Channel with the current time and current title.
When you reload the System menu by exiting the game, it checks if the file exists and compare the temporary file's informations with the current time to find the play time.
It then write that "played time" and "title name" into the Wii's board.
This process is done by the Wii System Menu only.
Now, when you are using USBloader GX:
There's an option to write the temporary file with the current time and current launched title.
If you want to register your real play time, you have to always exit the game to the system menu.
If you are using the option to "return to" the USBloader when exiting the game, you will never go back to the system menu and the Wii will never write the log to the message board.
If you exit from the USBLoader to the system menu after playing multiple games using the "return to USBloader" option, it will only register the last played game.
So, you can't see your past "played time" if you never set this option.
It will start log it once you start using it.
You need to always exit to system menu for that option to work correctly (don't use the "return to" patch, and don't switch off the console while in a game).
