Personally, I love to get reviews like that. When I do, I'm delighted. I won't improve without knowing what works and what doesn't. I also don't have a beta reader, so I sometimes miss an error like a wrong tense (has/had) where spell check doesn't pick it up. Knowing about those little errors is also very helpful, so I can go in and fix them.
Then again, I treat my writing seriously, so I welcome serious concrit. A publisher's editorial staff isn't there to pet authors and make them feel good, either. Me, I'd be delighted to have her input.