All but one (of the above 5) were cut with a grinding wheel. The abus was pried.
And these are just the ones that my particular shop dealt with, AND theft where the perp happened to leave the lock. There are many others in which the lock is gone as well, so who knows....

5 in 6 months. (That I know of.) Far from irregular or infrequent.
It should be noted that all 5 of these were locking up very expensive, desirable bicycles. (All valued at minimum of 2500 USD$.)
I don't know why people ride such expensive bikes and lock 'em and leave 'em. I wouldn't. I guess they figure "Hell, I've got it insured....."