Well, the speed perceived varies not only from phone to phone but also from "Joe" to "Joe", right?

Seriously, take a look in the first group of commands in post 1281. They're telling the kernel that when these processes need to read or write a file, they have the priority determined by the -c and -n flags.

So, for example, meegotouchhome will have io priority class "realtime" (-c 1) and classdata (-n 0), what means it will be the most prioritary process running in the phone.

Processes with "-c 3" (class idle) will write or read only when other processes are no trying to do it. That's ok for them because they're background processes, meaning there will be no lag in the user interface.

These commands work only in open phone, and if they're applied, lags in the user interface will be vary rare.