I've noticed that a lot people cite that West Indians conditions won't favour the SA attack...

Why Not?

Here is success rate within the West Indies after 2000 in order of success:

SA won 10 out of 12 - 83.33% Success Rate
Pak won 7 out of 10 - 70% Success Rate
SL won 3 out of 5 - 60% Success Rate
Aus won 4 out of 7 - 57% Success Rate
Eng won 2 out of 5 - 40% Success Rate
Ind won 3 out of 8 - 37.5% Success Rate
NZ won 1 out of 4 - 25% Success Rate

If someone knows something else, that I don't know about the pitches...please do tell..