Yes, that is the version.
1. you could upgrade the OS. Latest OS: 8300 22.214.171.124 / 126.96.36.199 (MultiLanguage)
2. As jmwking asked, if you are running any applications in the background (click Alt + Espcape) those can slow the device down also. Your call log, BBMessenger, Messages, Browser will always run in the background. Make certain your Browser is not on an active webpage.