Nice video, DarkBuddha. It looks like in most conditions the STs ground clearance will not be an issue at all if it can jump over dips like that.
This is a good read on the suspension components on the Focus Titanium, likely the components on the ST will be similar:
2012 Ford Focus Titanium: Suspension Walkaround
I found this data on another Forum where someone measured a stock Titanium without driver:
2012 Focus Titanium Ground Clearance --
front bumper: 185 mm (7.28in)
engine cover lowest point: 120 mm (4.72in)
exhaust system lowest point: 220 (8.66in)
exhaust pipe 250 mm (9.84in)
rear bumper 260 mm (10.23in)
sills 160 mm (6.30in)
rear suspension elements 150 mm (5.90in)
Not sure I like the engine cover being the lowest point by more than an inch...
I heard on various sites that the ST was "10mm lower", but I'm not sure where on the car or compared to what. My guess would be the body is 10mm lower than the Focus Titanium with the handling package.