Well, let's assume this is true. Let's say display production is equal between suppliers, LG, Samsung, Sharp all having 1/3 (which is a ludicrous proposition as they have different manufacturing capacity). If Apple cuts Sharp, but keeps Samsung/LG numbers normal, they've still cut their orders 33%. That's quite a big margin.
So even with Samsung and LG being oblivious to cuts in orders, Apple has decreased its orders by quite the margin. People are saying the iPad Mini numbers are too blame, that the iPad Mini is cannibalizing iPad sales. That's expected. Is it 33% of it ? That would be big.
Again, this is assuming this stuff is even true and not just "seasonal shifts" being hyperboled to mean something they don't (everyone knows Jan-Mar is a slower quarter than Oct-Dec for everyone in consumer products). We'll all know next week, Jan 23rd at the financials.