There’s a 1940 report on the performance of the Hurricane versus the Spitfire which was prompted by questions regarding the difference in speed between the two. The original was never published but is available as DSIR 23/784. I have not actually read the document but a summary is included in the paper on the Spitfire’s wing here https://www.aerosociety.com/news-expertise/journals-papers/papers-of-the-journal-of-aeronautical-history/. I guess the phenomenon you mention is just one more factor to add to the list. Without wanting to re-open the whole debate on the wing thickness it does appear that Camm’s attention to detail was somewhat less than that of Mitchell, reflected in the number of man-hours required to build each type.

Give me a day or two and I’ll scan the papers

edit…..Oh, hang about, wing-body interference was one of the factors noted in the report.