Dr. Trenb...your comparison are not equal and thus don't make sense. Jack Westin charges $1,400 for group online sessions. Many of the other prices are for one-on-one Private tutoring, some in-person. With Jack Westin, you may get on average 20 hours for $1,400, that's $70/hr for group sessions. I found a VERY capable MCAT tutors in my area who charged me around $60 for one-on-one tutoring and was able to get me a very competitive verbal score. This is not something I achieved in a class setting.
I recommend the same to my friends, if you can benefit from a class, take Princeton Review, or Berkeley Review or Jack Westin and you'll be fine. If you have bigger issues in verbal, you will benefit most from individualized tutoring.