He's a commercial brewer and thus can't just throw in an extra half ounce of hops to offset any effect the yeast may have of dropping the oils out. Also that article doesn't say that's the reason he drops the yeast out. We all drop as much yeast out of our beers as possible, save for styles like Hefeweizens etc.
There are advantages afforded to us on the homebrew scale that commercial brewers don't have. The low cost of a little extra hops is one of them.
That said, I think that effect is negligible compared to the effect the O2 is going to have when you add an extra racking from primary to secondary. Ther are also advantages afforded commercial brewers that homebrewers don't have. Closed transfers is a huge one. Vinny doesn't have to worry about 02 because he does all closed transfers. The commercial breweries I've brewed at all dryhop in the bright tank, but we don't have bright tanks in homebrewing, the C02/02 is the difference. If I ever secondary at home (for a fruit/spice beer) I try to flush the carboy with C02 first, although you'll never get the PPM counts as low as a commercial brewer even with that technique.
If folks really want to secondary, then I suggest using this technique, even if I think it's unnecessary risk since I get amazing results dryhopping right in the primary, and I can always put another round of dryhops in keg (serving vessel, also not the same as secondary) and flush with C02 before racking.
I'm not here to do a secondary vs. not thing though, everyone brew the way they like to brew, I'm merely explaining the rationale for the way I brew.
Edit: I'm re-reading that article (as I did read it when it first came out), and it looks like Vinny agrees with me (see below) on the dangers of 02: