Biz class twice on each between JFK and BCN/MAD and I prefer AA. Food was better on AA, wine better on IB, entertainment better on AA, seats for sleeping were equal (I sleep on my back on a firm mattress regularly), seat organization when eating and not sleeping, IB felt like it provided more room, on board staff more preferential to European travelers than Yanks (but maybe it was me). Missed connecton in MAD by two minutes was treated very poorly by very indifferent IB reconnection staff. In fact, without getting political and mindful of complaints on the AA boards, IB indifference by its staff of customers was very indicative of the problems being experienced in the Euro-zone.

I'm flying from JFK --> AMS on AA to LHR and BA to AMS in February and I intentionally avoided any flights through MAD or on IB in my selection process.