Looks like the opposite to me. First time I saw an iPhone jailbreak, it was just a matter of visiting a certain web site and tapping a button. (This was, of course, an obvious remote root vulnerability that definitely needed to be patched.) This came back briefly a year ago, but didn't last long. Devices were generally jailbroken quickly and easily, but it's been getting harder. The iPad 2 still doesn't have a usable jailbreak despite having been available for half a year now. iOS 5 only has a tethered jailbreak (i.e. you must connect it to a computer when rebooting the device) and even that is only on certain devices, even though betas have been available since the summer. In fact, even iOS 4.3.4 and 4.3.5 don't have untethered jailbreaks.

To me, it looks like Apple is actively locking down the platform in a big way and trying pretty hard to shut down jailbreaking entirely. Given how long it's been on the iPad 2, I fear that they're succeeding, too.