tdracer, not sure what you mean about the 767 weight. According to the Boeing airport planning documents the 787-8 is a lot heaver than a 767-300ER, an extra two thousand pounds on the wings would be insignificant. (260,000 lb vs 195,000 lb) ?
http://www.boeing.com/assets/pdf/com...ps/767sec2.pdf
http://www.boeing.com/assets/pdf/com.../acaps/787.pdf
Care to clarify ?