It's not rude, and well done for getting someone to request a full, quite an achievement. It's been a busy time of year - summer hols etc, I'd wait to the end of the month then drop him/her a polite email wondering what they thought of your manuscript.
Hey Liz, I've not been on here for a wee while and saw your post. Congrats on getting that request. Did you hear anything back? I had two responses for full MS a few years ago. One responded quickly, the other never got back to me at all, although I did politely ask eventually!
Congrats on getting full requests! I'm in a bit of a quandary myself. I've had three - one has written back saying they are moving agency but would like to find out what I have in mind for my next idea, once she's in her new job (confused about what that means for my current manuscript), another has had it for three weeks and one for eight weeks (but have not heard a peep since). Having seen the comments, I'll write back and just give a gentle nudge so thank you for asking the question. Good luck with yours!