The /usr/sbin/suexec program is installed by the 1.3.12-2 apache-rpm with modes set to 711. In this case (viewable with httpd -l) suexec isn't used (which would be senseless). If you change permissions by hand to 4711, it works.
This is the default suExec installation behaviour. If you don't know what you're doing, you are better off leaving suExec disabled. This way it can be installed safely, but enabled only with administrator's intervention. I don't know if Redhat would want to enable it by default though.
In this case mention the intention with it somewhere noticeably, please (e.g. a short line in the rpm description tag)
The manual (http://localhost/manual/suexec.html) describes SuExec operation better than a blurb in the package description ever could without becoming atypically long.
I wanted to propose a pointer to the location of the manual section, like "For suxec to work see ...."