It does take eight minutes (not recommended for live performances without a backup PC!), but once it is all loaded in it switches songs and states entirely smoothly, as everything is in memory at that point. Like I said, I have had this sitting open for days and days sometimes without a hiccup.
The only reason it takes eight minutes is due to the fact that I have several VST’s that are huge and take up most of the time (Arturia stuff and Komplete Kontrol hosted items).
Once past those, it only takes 3-4 minutes to load everything else.
Terry