Regarding the original post:
Is it possible that testing techniques have changed over the years and could make up for different scores for people from different decades? Also, I'm not sure if IQ tests are standard. I've done many different IQ tests officially and unofficially (ie. with researchers and without) and the results do differ. Also, attempting to put this in a different way: You've seen those photos of your favourite movie star plastered on the tabloids with their cellulite and acne and the beer gut. They look just like you and me, maybe worse

, but they still make poo loads of money doing a job that "requires" perfect looks.
I know many sports people with lower "sporting potential" (let's call it SP) than me because they have one arm or no legs. Let's say my SP is 100 (i have all normal bodily capability so I sit at 100%) and someone missing an arm has an SP of 75 (because he can't do all the things I can in a standardised test). But I'm telling you right now that my one armed friend would kick me into yesterday in a swimming race, because he is awesome at that. He trains (does not come into play in a SP test), has learned technique and has more heart than anyone in the pool. Why should someone's IQ determine what job they could perform?
My opinion on IQ in general:
I remember thinking, some days I could solve any pattern problem you could throw at me and some days it seems as if my brain just isn't in the problem solving mood and I stumble around a problem for ages with bad results. This must affect IQ test results. What about those questions you get to in the last five minutes of the test and you just randomly guess the answers for. Say you got 25% of those right (considering a,b,c,d multiple choice) for 20 questions that you just guess at the end.
Also, I've noticed that people who are defensive about their own IQ score (maybe they feel it is not an accurate representation of their actual intelligence) are the first to say that the tests are worthless. We don't even know if we compare with others or not. I couldn't tell you the IQ of any of my friends or even my family for that matter, nobody shares that kind of info. Why is IQ such a secretive and elitist number? Not sure if anyone has mentioned their own number here. People do hold a certain value to it, obviously, or otherwise everyone would have put their IQ at the top of their post with no fear of comment. I've never been asked in any job interview or entrance exam for my IQ. Is it really then such a standard of intelligence? And if I told them would they believe me or think I was just boosting my self worth. Like telling people how much money you have or how much you weigh or how big your... hand is.
IQ from results that have been revealed: between 125 and 135. That's apparently above average. Why did I fail subjects at university and only produce ok results? (a couple of A's but mostly B's C's and D's) Because it was damn hard no matter what anyone's IQ was and I didn't always work very hard, but even when I did, I still battled sometimes). Now I'm a practising engineer and I know other engineers with higher and lower IQ's, doesn't make them any more or less of an engineer. Just as I would assume your IQ wouldn't make you any better or worse at being a scientist.