The second article is wrong. I've tested it and followers don't level with you. They stay the same level as the first time you met them. (note not the first time you hire them) So make sure you don't locate all your target end game follower till you reach at least level 50. My now gimped Aela is being one shotted by everything at my level now....
I noticed this too. I used the archery training exploit at level 2, then ditched the guy for lydia until level 30, when I thought it would be neat to have an uber archer sidekick and had the gear to make it happen. Unfortunately, even with pimped gear he got totally owned everywhere. Sad day.
I just confirmed on the PC version that they don't level with you. I got a new companion at level 50, checked her level, and it was 30. I then used the console to level up my skills a bunch of times and got to 63 to see if the companion would level up as well. She did not. Still level 30. I then told her to go home and waited for 2 days to see if that might update her level. Still level 30. --- Your mother is so fat that the recursive function computing her mass causes a stack overflow.
Well, it seems the follower won't even match your current level when you first meet him?
Does that mean each one has a set of range for their level and won't be higher than that no matter what? Good thing with pc is someone will come up with some mod to modify it. Too bad I purchased the ps3 version to play on my 60" TV.