Actually, would be 999999 very sufficient..
The thing is BIS have BIS'd this in ArmA, or it's some new feature that reduces all features into only two features.
The only fade types working with titleText or cutText (does the same) in ArmA is "black faded" and "black". Trying the other types does nothing.
As you may have noticed there is a automatic fade in when ever you start a mission so maybe that somehow screws things up.
Anyway, to get longer 'blackness' in the start:
sqs
cutText ["","black faded"]
~10
cutText ["","black in"]
sqf
cutText ["","black faded"];
sleep 10;
cutText ["","black in"];
Now, after 10 seconds of blackness the view fades in..
The second cutText is just there to 'break' the first one because it seems the type "black faded" is eternal no matter what you put in as the duration time..