Left an Ipad on a regional flight from DCA-JFK in march. Got it back...but not for 3 weeks (and 10 days after they said it would be shipped and there within 2 days)....oh, and it had been cracked
Long story short: you've got decent odds of getting it back. But don't expect ANY helpful communication from anybody in the lost and found department. Customer service gives you the runaround, if you want a number to call, call the lost and delayed baggage number. Found that out only when I had to submit a claim for my Ipad being cracked.