I could cut through that with a concealable set of bolt cutters in about 5 seconds.
You don't even need something special. Use an allen wrench to take the seat post off, possibly something to deal with a skewer, and then kick the chain in half.
bolts would be faster.
Word to the wise: bike locks don't stop thieves, they deter. The better the lock, the bigger the time window to catch the thief in the act.
Also... uh...
my new frame