When I moved here over ten years ago, I seem to remember that my residency process, which I kicked off at the Arg consulate in Barcelona, was at least six months down the line. I hadn't by that time got my DNI but my temporary residency had been approved. I also appointed a guarantor and used a customs broker this end appointed by the broker in Spain.
I do recall handing over the odd brown envelope, but my personal effects, including furniture, computers, pictures, tools etc were never actually held up.
The part that took the longest and which was the most bizarre, was trapsing around government buildings in cap fed for an entire week ending up at a building in the port known as EMBA.
That experience (EMBA) was akin to a Nazi interrogation...was I importing works of art etc etc? And yes, a bribe was paid.
I finally got my belongings no more than a month after they were unloaded off the ship, but the key was the temporary residency.