Lets give an accurate picture:
One particular group
8 starts end of last year; 3 currently checked to line, 1 awaiting completion, 4 training terminations.
The 3 passes were type rated experienced Captains on A330 and B744.
The 1 awaiting completion was a type rated experienced A320 Captain.
The 3 Failures were conversion from Boeing to A320/A330.
1 Resigned during Training.
Other earlier Groups were similar. It looks like guys experienced on type have a reasonable pass rate, but the moral is don't come to Saudia on a different type. They want you to fly like an experienced captain on type and there is no margin for error on that requirement.
Training does take 6 to 10 months. There is no history of significant upgrades of foreign F/O's, so don't expect that.