Yeah. I suspect that in most cases you're correct. But some basses (Roscoe's with the shaved down thickness on the neck like Gard's) to tend to take a day or so after removing the strings and reinstalling them to settle back down. At least that's been my experience.
The other thing that I might add is oiling down your finger board every week might not be a great idea (depending on what you use). Lemon and linsead oil is great to clean and condition a finger board but most folks recommend just 2 times a year. Every week or so might not be a good thing.
Here's what Bob Taylor has to say about it:
Question: On guitar chat forums people rave about the merits of using lemon oil to clean their guitar fretboards. Other people respond by saying that lemon oil is actually bad for the guitar. Can you shed some light on this? — Claudio R. Montreal, Canada
Answer: Claudio, I’d have no worries about using lemon oil on my fretboard. It’s safe. Use it only on the unfinished wood like the fretboard and bridge. The wood can dry out over time, and an oil like this, or linseed oil, or even mineral oil, can protect the wood and beautify it as well. Don’t overdo it. Once a fretboard has been oiled a few times, you can slow down the frequency. The nice thing about lemon oil is that it cleans while it oils, so it won’t build up as easily, but be sparing. I don’t think your fretboard will need oiling more than twice a year, and eventually, once a year.