Agree with them. You'll get use to the style of the MCAT after awhile. I never felt like I was rushing but I finished with plenty of time left in all the sections.
The reason you need the extra time is to go back and double check your answers and stuff. Also, I marked questions I wasn't sure of the first time through and when I went back through, I knew that I had finished the rest of the test and could take my time to comfortably work through the difficult ones. If I spent a lot of time of those questions at first, I'd always be freaking out about running out of time, and might actually run out of time. By skipping the hard ones, you maximize your score by making sure you answer all the ones you know and by putting yourself in a more comfortable position time-wise with the difficult ones.