That's not surpising IMO. They're an expensive brand so repairs to audis are going to be more than their VAG siblings.
My boss loves his audis but even he admits they're not the most reliable cars. He had a TTRS and his wife had an a3 TDI both with DSG boxes. Both gearboxes failed within a few months of eachother, costing about £8k combined. The TT got chopped in for a brand new RS4 6 months ago and its been back to Audi for something (don't know what) already
They have the perceived quality thing because the doors go thunk but it doesn't surprise me that they're not hugely reliable or cheap to repair