We recently updated the Branch Repeater specification sheet at:

http://www.citrix.com/%2Fsite%2Fresources%2Fdynamic%2Fsalesdocs%2Fcitrix_branch_repeater_specsheet.pdf

Note the addition of a Maximum HDX Sessions specification.  While HDX is already optimized for a WAN, there are several additional benefits by accelerating ICA with Repeater and Branch Repeater.  The Maximum HDX Sessions specification is a good rule of thumb when designing your HDX WAN deployments where WAN optimization is indicated.  The specification is designed to meet a generic XenDesktop or XenApp deployment.  Data intensive applications like CAD, continuous tickertapes, etc. may cause a Branch Repeater platform to hit maximum capacity before reaching the published specification.