You should see similar perforance in El Capitan.
I can confirm that Excel & Word 2011 are absolutely fine. Outlook 2011 however hangs a few seconds after it starts to sync with the exchange server.
I've had to resort to web based calendar and mail after installing El Capitan. I get beachball and freeze every time I launch. Really, none of this came up in the public betas? Luckily the new Pin Tab feature lets me get to the web based version of calendar and mail.Outlook 2011 hangs immediately with spinning beachball of death, requiring a force quit. And because my organization hasn't updated their Exchange server, I can't use 2016. So my only option is the terrible Outlook webmail. I really hope whoever is at fault here—MS or Apple or both—get this ironed out before the final release tomorrow.