Hi doma,
"Quite suspicious" ain't "certain" by any definition.
I don't doubt his sincerity. But he doesn't seem to have heard of Christmas.
Still, I understand that you wish to continue to derive your view from Biderman. Rather than examining the numbers for yourself. Maybe that's your herd instinct for you!! ;-)
In the unadjusted numbers, the year over year growth is plain to see from one January to the next. So even a sceptic reviewing the figures can see the growth trend. You don't need to worry about the method of the adjustment to see that it is so. Unadjusted January to January strips out seasonality just as well as any other method.
Are you curious about unadjusted figures and growth in employment in the US economy. Or are you just being picky about the method that BLS uses to calculate its seasonal adjustments? And then only because someone else is.
Perhaps he's lonely because he's on a wild goose chase?
Clearly unemployment is reducing and employment is increasing. Whether you use adjusted or unadjusted figures.