That's the thing: how is it reaching to say day 1 sales are an irrelevant metric? Things like supply constraints, regional/worldwide launch and launch software selection can all affect day 1 numbers and yet have zero bearing on the long term success of a console (as evidenced by strong starters like Dreamcast flopping, or slow starters like PS3 picking up over time).
I can't find any suggestion within the article that PS4 wasn't gonna sell well - just an indication that day 1 sales alone aren't an indicator that it would succeed (an assessment which to the best of my understanding holds true).
From the Orland artical
Ps2 500k first 24 hrs life time circa 150 million
PS4 1 million first 24 hrs
Dream cast 372k first 4 days life time circa 9.13 million
Ergo under your comprehension and Orlando tenditious argument first day sales don't matter as dream cast, one of the generations losers sold less than the PS2 first 24 hrs in 96 hrs ........ Hint all that generations losers sold less day one than the PS2 in Orland's own figures.
Remember the ps 2 and the Dreamcast were "generation" competitors.