People must understand when they compare with the RRoD how serious it actually was. It was a failure rate of 25-33%. That's a huge number by any standards. Not even the PS1/2 laser problems were that bad.
Personally it is not surprising at all to hear of Sony having issues with laser lens and disc read problems, as they have never quite shook it off in well over a decade, but comparisions to 360 failure rates are unwarranted. If you have a PS3 you still have a reasonable expectation that it will not fail. That's not the case with the 360 where you have a 1 in 3 chance that it will die on you after extended gameplay sessions.
Touch wood though, you never know. Some guys on here are on their first 360 having gone through several PS3s (such as Nokkon) and others like myself have gone through several 360s but never had a single issue with a launch PS3.