It is always a joy to see a standard size GSD at a slim weight - they look amazing. I hate seeing obese GSDs, but I do like the look of tall GSDs (above breed standard) so long as they are slim. Also, don't know if you show, but a friend of mine who does show told me when they have German judges, the German's love them slim and within the breed standard for height (they get good points).
Also, sometimes people not familiar with GSDs think girls are just small if they are used to seeing male.
Just my opinion.