It should be - but I’m positive that everybody with over 10 years experience is calling themselves a “senior developer” by now. There’s no level after that, so most everybody over 35 is a senior developer.
It always sticks out as an, "Oh REALLY?" But without talking to the candidate you never know if it reflects poorly on their knowledge of their own limitations, or is just a sign they happened to work for companies with title inflation. I've seen both.
3 years after that, I went to work for a company that had the same thing happen and now I'm a 'Technical Lead / Software Architect'. I didn't choose the title life, the title life chose the shitty companies I worked for :(