I think it is pretty self explanatory but I'll explain. There is a difference between trading a pick that is projected to be a late 1st and a mid 1st. I was responding to posters saying the best teams do trade picks to increase their odds of winning the Cup which I think is true. The point I made is that firstly these "best teams" do need to be actually be the best teams (i.e. the are legit Cup contenders). Secondly they need to get a good return on the guys they acquire (e.g. TB acquiring Coleman and Hagel as opposed to Jeanott). Thirdly, going back to the first point, the best teams are expected to be drafted with the last picks of the first round.
I would be reluctant to trade a top 15 pick as opposed to a pick in between 25-32 for immediate help if the returning player isn't young and will be contributing his prime years to the team for years.