I couldnt wait for my order so i bought a base model. i installed ML gm and it was significantly faster. MY order arrived this morning for the 2.6/16/512 model... and i installed ML right away...the 16 gb is definitely working ..i dont see lag like i do on the base... i asked my wife to verify and she could see the base have a slight hesitation while scrolling. i am very happy with my purchase so far.. i decided to give my wife the base model. this laptop is worth the wait..