nealric is right that a good technical background will serve you well in IP prosecution regardless of where you went to law school or how well you did there. In a strict prosecution shop, hardly anybody cares where you went to law school. That's appropriate since, after all, most of the work can be done by people without law degrees (i.e., patent agents).
However, it's also possible to make up for a rudimentary and unimpressive technical background in IP with a solid legal one. Some aspects of IP litigation don't require a technical background at all.
Of course, the different sets of qualifications, technical and legal, will have different applications. You won't be sending the MIT PhD who grew up in Magnetogorsk and barely speaks a word of english... no matter how brilliant he is... to argue your case in front of a jury any more than you would send some Harvard Law Review schmuck who thinks that kirchoff's law is for calculating duty in negligent torts to take an invention disclosure at JPL.