Probably.

The truth is that the first lock that you put on your bike, no matter how cheesy, is about 90% effective. That's because it limits stealing your bike to thieves who brought the right tool to defeat it. As you go from 90% effective to 99% effective you engage in a high-tech and expensive game of one-ups-man-ship with the thief. There is no 100% effective bike lock. Given the time and technology, any lock system can be defeated.