JeremyG, I sympathise with your idea about ADD vs. Laziness. Let me give you my ADDer's viewpoint:
I am a systems analyst with over 20 years experience in software development. I've worked hard, including 11 years with a consulting firm and 3 years in a software manufacturing firm. 10 years ago I hit a wall, where I had to work SUPER hard to do complete things that my colleagues found easy - things like timesheets, expenses, estimate, etc. After years of hunting - including psychotherapy, herbs, osteopathy - I still did not have an answer to "how can I make my job less stressful?". Then, by accident while researching allergies, I came across ADD information, which I took to my doctor. After a referral to a psychiatrist for evaluation, I was diagnosed with "inattentive ADD" and offered the option of medication, which I took. Oh My Gosh - suddenly everything fell into place. I understood: why meetings and parties stressed me out so badly; why my timesheets were always wrong so I had to redo them; why I "crashed" in the afternoons. Also: why I excelled at Abstraction; why end-users like me so well (that ADD timing and humour); why debugging programs was so easy for me.
Now, from my short bio above, perhaps you can tell that I am not a lazy person. The pattern described above is common for inattentive ADD, and here is why: ADDers often have above-average IQ, so they learn to circumvent their disabilities, to compensate. They don't even realise they are doing things differently (in their heads) because the end result looks just like everyone else. But when we reach our thirties, life becomes so complex that our coping mechanisms fail and we start to feel incapable and stressed out. Fortunately, many doctors are now realising that ADD can persist into adulthood and are helping us out. I can tell you, had we found this in childhood, my life would have been so much easier, so different - I'm tearing up here, thinking of how things could have been

Getting medication suddenly allowed me to see how so-called "normal" people function (for example, normal people read a page from top to bottom... imagine how hard life would be for you if you had to read thru a toilet-paper tube that jumped all over the page. Well, it sure develops our intuition
Regarding laziness: in any sub-population there will be lazy people. There are probably lazy creative types, lazy math-whizzes, etc. And lazy ADDers. But let's not confuse the two: ADD is not simply a manifestation of laziness. However, it is worth noting: because ADDers are often of superior intelligence, we know when we are beaten and give up doing things we are not capable of (in my case, cleaning house - I hire someone. Organisation is a huge challenge for me, and I save my energy for being organised at work, which takes a lot more energy for me than for other people.) Let's not excuse laziness by calling it ADD... but let's not label ADDers as lazy.
I hope this personal perspective is helpful.