In previous versions (pre 1.3) of Corona it was "normal" to expect long (~4 min) scene parsing with backburner network rendering. But in 1.3 it grows up to impossible 6-8 minutes. Plus 3dsmax.exe process seems to be freezed as it can't be closed even by task manager for some time (at least in DR mode).
On pictures you can see scene rendered with 1 minute time limit. Scene parsing takes up to 8 minutes at random frames and servers. No DR used.