And I will (hopefully) have some answers.
I can't speak to other poster's understanding of evolution. However, there are a number of boni-fide biologists that post and have posted on this forum. I would wager that they probably have much more of an understanding of evolution than your average Joe.
Prior to genetics, scientists only really had fossils and existing species physiologies to go by when it came to evolution. The discovery of DNA and genetics resulted in a giant new dataset to add to the overall picture. In particular, scientists could now look the actual genetic code that was being changed and inherited via evolutionary mechanisms. And they also now begin comparing genetics between different species.
And they did just that. Prior to genetics, scientists would try to create "trees" (i.e. diagrams) that show how different species are related via evolution. With genetics, they can do the exact same thing, only using a new set of data. And what is really remarkable is that the trees they would create with genetics in general lined up pretty well with previous trees created with other methods. Now certainly there were some descrepencies, especially when it came to closely related species (for example, scientists used to think that gorillas and chimps were more closely related to each other than humans, but now they now chimps are more closely related to humans than gorillas). Regardless of descrepencies, however, the overall picture still pointed to patterns that suggest very strongly evolutionary common descent.
More recently (mainly in the last 10 years) scientists have been decoding whole genomes (i.e. the entire genetic code) for species including humans, chimps, and many others. And from this dataset, they are now doing complete genome-wide comparisons between species. And the verdict of these comparisons still points extremely strongly to evolutionary descent.
Please see
post #266 of this thread, where I already answered that question.
They don't. Case in point was the story a number of years back about the speed of light being broken. The media sensationalized it (claiming just that, the speed of light was broken), even though that wasn't really the case. And the researchers whose work had been reported on apparently weren't happy with it either.
The problem is that the stories you get in the media have been heavily filtered. You have a journalist talking to scientists (one hopes) and interpreting their findings. The journalist then takes their own understanding and puts down a story (usually very brief) to try to convey those findings. Then the reader reads the jouranlists interpretation and further filters it through their own understanding, biases, etc. So going from the original findings to the end user, a lot of filtering has taken place. It's like the telephone game. Stuff gets mixed up and lost. The only way to really know what the findings were about is to go to the original published journal papers. But in order to do so, one needs a solid background understanding of the sciences involved, or it might as well be like trying to read a foreign language.
Really, media is a double edged sword. They do try to make things understood for the layman, but a LOT gets lost in translation in the process.
I hope that clarifies things. If you have more questions, I will try to answer them.