I'm a big Flying V fan and the problem you describe isn't just a Gibson one
the problem as already described is the increased sideways pull due to the angle the string makes as it goes through the headstock
Also Gibson like many companies try not to make the nut slots too deep which is considered to adversely affect the tone
But the downside is that strings can skip out of shallow slots
Often if the strings height at the nut is a bit high when leaving the factory , a professional set up results in a slightly deeper nut slot which in turn helps with the string staying put.
Sadly it is true that forums do attract a few "hotheads" who have strong opinions on most things and often little real experience to back them up
And sometimes you do get some very partisan opinions as well as opposed to carefully thought out and balanced/informed information or anecdotal evidence.
Gibson make some good guitars that with some loving care from yourself or a qualified/experienced tech can be Great guitars. This is true of many companies- they run a factory and their products benefit from having a bit of extra after sales attention
We also stock the Earvana nut system mentioned above.....
http://earvana.com/