Big airlines...?
Well, I dunno Kaptin M.
Seems to me I remember clearly that SQ had new pilots (250 hours or so) directly trained as First Officers on Boeing 707 equipment.
Gosh, come to think of it, I actually flew with 'em...and strangely enough, survived.
Of course, in those days they were trained to proficiency...as in 30+ circuits in the aeroplane (not to mention advanced sim training), before they were released for line training.
Now, if these guys could to do it then, on an aircraft that was not all that easy to fly(especially with an outboard engine failed at rotation), why would the same caliber of guy have trouble on an A320?
Yeah, I know it's an Airboos, but even so, seems to me that this would not present all that many problems.