Is yum-presto supported ?

Issue

Normally when you update a package in Red Hat Enterprise Linux, you download an entire  replacement package.

Most of the time (especially for the larger  packages), most of the actual data in the updated package is the same as  the original package, but you still end up downloading the full  package.

There is an upstream yum plugin called Presto that allows you to download the difference (called the delta)  between the package you have installed and the one you want to update  to.  This can reduce the download size of updates by 60% - 80%.

Is this yum plugin supported in Red Hat Enterprise Linux ?