Just a little post to inform you that the Lync2013 Vdi plug In with the new Citrix receiver works (see https://unifiedit.wordpress.com/2014/02/13/lync-2013-support-vdi-citrix-receiver-4-1-02/) . We performed just few basic tests for the moment with 2 and 3 users in the video conference with success with no HDX crash, and a good active speaker commutation process. The graphical rendering is good. We will test this in a wider population (200/300 Users) to have a better feedback. I will let you know.
The following picture display the tested configuration