Slim jim most likely not. They are most likely using a long reach to get to the lock stitch or lock bottom, and using a air bag for prying open the door frame that little bit.
I have a kit for breaking into cars as I'm a tow truck driver. You can get these kits from snap-on, mac tools, macco, But they normally only sell these kits to people they know are tow truck drivers or to a shop.
That's the most easyist way to get into them. I can be in a Integra in about 5 seconds with my kit.
Get a good alarm and don't keep anything where you can see it from outside. Also don't have your sound system turned up anywhere you are getting close to, because people hear that and go, oh look something I can steel.