The one good point I took from that article was the factory grease - while it may look like lube, it may just be packing grease to keep the gun from rusting on the shelf (not that ANY gun is in stock long enough these days, to start rusting!). Always a good idea to at least clean-and-lube before firing it the first time.
I picked up my Hellcat about a month ago...and it was bone-dry. There were marks on the rear of the barrel (the square part that sits in the ejection port when the gun is in battery) indicating test-firing at the factory...but there wasn't a drop of lube on it. Anywhere.
When I bought my XD-s years ago (from a different store), I took it right to the range...but this was back in the days when stores HAD guns on the shelf, and had time to go through each one and do a proper "prep" to them before putting them out for sale. That particular store - now closed, unfortunately - always prepped their guns before putting them out. They'd do the initial clean/lube, and their 'smith would bore-sight them to make sure everything lined up. If anything was out, they'd test-fire and adjust until things were properly lined up, then clean/lube again before display.
I miss that store. Those were some good guys.