In most cases, yes.
The exception would be if a large amount of polishing was required to remove bad astigmatism or a rolled edge. In that case the focal length might change by 1/16" or a bit more, but this would be somewhat rare.
In the event that a re-grind is required, say in the case of a surface damaged by chemicals, the change could be larger depending on what tooling is available. Hopefully this is even rarer.
Cloudynights is awesome...you ask a question and it gets answered by one of the world's leading authorities on the subject. Thanks!
Next clear night I'll do a star test and report back. I think I'm dealing with a tad of either under or overcorrection, I don't recall which one.
Which is the one where it's better inside of focus, ie eyepiece closer to OTA?