Please MS be consecuent, be smart, do not foolish to your customers, sample Windows Server 2012 R2 is out and Exchange 2013 SP1, is not, tak off you product architecture and put it on it again, put out TMG waht next to release a new version, due to poor
implementation of Reverse Proxy for Exchange Server 2013 using IIS ARR and Support or your new idea Web Application Proxy with Windos 2012 R2 that needs to deploy ADFS, that sounds liek you previous trial of ADAM in DMZ, be serious in your directions, Lookup
for an stable architecture direction in your other times I miss the times when Paul Bowden was Exchange Technical Product Manager, and sure that i am not the only one,