Wind most certainly isn't base load. It's highly weather dependent. Occasionally, Ireland's wind infrastructure produces the country's entire electricity demand, and they actually have to start shutting down wind turbines. Also occasionally the whole system only produces a couple of hundred megawatts for a period of about a week.
There are some locations with very reliable constant wind (though usually only for part of the year) but that's not the norm. Offshore wind does better, but is still far from base load.
Do you have a link to an article on this? My impression was that Germany was trying to move away from base load as a concept entirely, using unreliable renewables plus highly responsive fossil plants instead.
Which is surprising as I remember reading that France has tremendous difficulties satisfying their electricity demand, especially in winter (lots of electric heating apparently).
There are some locations with very reliable constant wind (though usually only for part of the year) but that's not the norm. Offshore wind does better, but is still far from base load.