Yep, whenever I see the statement "I have [compression ratio] with an ISH at the end of it I then KNOW they have NO idea what the CR really is. Example: I have 10:1ish compression.
I don't deal with ish very well. It's simple math. If you are paying for an engine assembly the guy better damn well give you an exact CR and SHOW THE MATH.
But then again, I charge 1K to do the assembly and that's not making hourly. Damn glad I'm retired.