Data point: In mid-January, I booked 2 RT business class partner award tickets to Europe (one from my FF account and one from my husband's) and paid 140,000 miles each. Travel is for late March/early April 2015. Called today and had 50,000 miles redeposited to our accounts (25K back to each account). The phone call took over an hour, but was well worth it for the 50,000 miles!