DFSR

I have a Windows 2003 domain controllers and want to upgrade all my DC's to
windows 2008. Now i want to know if after upgrading all my dc's and raising
the domain level to w2k8, will sysvol start replicating using DFSR? or
should we follow the FRS to DFSR migration path?

My understanding is that all new domains that have been started with w2k8/r2
will by default use DFSR?? is that correct? I have noticed that even after
staring the AD forest with a wk28r2 dc, there were no DFS Role Services
installed..is that the default behaviour? should DFS Role Service be
installed after the DCPROMO is done? i see DFS Service in the services
applet tho.