Thanks, guys. It's nice to know my bodies appear to be within within spec, with regards to lens fit. Like I said, this never seemed to affect performance, but snug is snug and loose is loose. Without other bodies to directly compare mine to, I didn't know how loose was considered too loose!
Mt Spokane, I'm sure you're right and I could have Googled this question, but I thought that's what our forum was for. I appreciate the direct feedback from actual Canon users.