To reiterate a few points:
Categorical General Surgery is definitely in a trough right now. While a number of top students are still choosing general, others have been swayed into the more "life-friendly" surgical specialties such as integrated plastics, urology, ENT, etc. which to the best of my knowledge have not gotten any less competitive (feel free to correct me if I'm wrong)
I'd say Liontrees assessment of general categories of board scores and "GPA" are fairly reasonable, although as he said, the numbers will only open the opportunity for an interview. You need to complement the numbers with good recommendations. Great recommendations will go a long way towards allowing people to discount your grades some.
As far as OR technique the only thing I can say is practice practice practice. Walk around with a needle driver in your pocket. Take extra suture and tie knots through all your boring lectures. Sew at home (I recommend pigs feet for subcuticulars, and chicken breast with the skin on for things like deep dermal stitching.
You can't change the past grades, but you can make sure you get honors in surgery and make good impressions on your future letter writers. Improvement counts too. If your board scores are substandard (<199), consider taking Step II early in your 4th year to show that you can do well on a standardized test.
If you love surgery and it shows, you will find someone to train you. Good luck!