Except, I never said G&D is such a firm, nor do I have any reason to think it is.
This is a non-sequitur. What if it was Wachtell? What if it was Williams & Connolly? Would your "advice" still apply? Let's apply this assumption to any firm except White & Case and
dla piper. Does your advice still apply?
Perhaps a better takeway might be, "If you are concerned that your grades might result in a no offer at the end of the summer, you should talk to recruiting/the hiring partner in advance of your summer.
So now you go from giving useless advice to giving
harmful advice. Why draw attention to something that a firm would just as easily glance at? What would you hope to gain from recruiting/the partner by drawing their attention to it? Are you hoping they'll tell you you're going to get no-offered? They won't tell you anything. And so what if they did? Would you start applying for post-grad jobs now? Who's hiring the class of 2012 to start in fall 2012 right now?
What else would the firm do? Would they revoke your 2L summer offer? Wouldn't that be even more harmful? Shouldn't the original poster in this thread be glad that he can at least have some valuable 2L summer experience, which is pretty hard to come by in the private sector after fall recruiting is done?
In other words, your advice has very little upside, and the potential for disastrous consequences.