Firstly, I don't class myself as an "expert", we all know the definition of that. I do however have a lot of experience reloading, I shoot 1000's of rounds a year and reload for 20-odd different calibers. I regularly finish in the top ten in my chosen discipline.
If you run your loads at the MAXIMUM, and the author of said article has to allow for this, then certainly, full length size every time. If you run mild loads, and want your brass to last longer, partial sizing works fine. You should always check that your cases will fit your chamber every time you reload anyway.( do this while they're empty) If partially sized cases are sticky they need to be sized more, adjust the die.
There is no hard fast rule, full length dies are cut to size brass to the absolute minimum chamber specs, therefore guaranteeing that the case will fit all chambers. The beauty of reloading is that you can size your brass to BETTER fit
your rifle. Top accuracy in rifles is achieved when the case is a perfect fit in the chamber, ask any benchrest shooter. For a hunting rifle, reliability becomes a priority and the ability to easily and quickly chamber rounds means a little more tolerance size wise.
Brass work hardens, which means the more you size it, the more brittle it becomes. This is what leads to split necks and case head separations. Of coarse head-space problems do too but that's another matter. I have 7-08 cases that have been reloaded 20 or more times, only ever been partially sized and still chamber fine. I only run a mild load in them. Other cases that I have to run a near maximum load for our 500m rams are full length resized each time and also need trimming occasionally. Needless to say they don't last as long as the others.
If you don't plan on shooting the crap out of them, then by all means full length size and you will have no problems.
I hope this clarifies it a bit more for you.