Folks, I am not here to create a heat wave. My comment is based on my experience and there are over thousands of them in the same boat unable to break 6.5 barrier no matter what they do. Can anyone guess the number of people who wrote IELTS in 2017 alone? Just do a random google search and get the statistics you will be amazed.
My scores in my attempts were
L/R/W/S
8.5/6.5/7.5/7.5
8.5/8.5/6.5/7
9/9/8/6.5
After re-eval - 9/9/8/7.5
Like I said I am not super awesome with my lang (but good enough to score a 7 in all modules), so are the rest of the 90% of us. IELTS is not even hard, unlike other language exams. They target the suitable candidate in order to redo their exams again and again. When you get tired they sell you their IELTS courses. Well, If you are spot-on with your lang, you will get past the barrier easily, bcoz they know you will challange back.
Please take this post as my personal experience and do not put yourself into it.
And before you jump on your guns, I got to disclose, I know Martial Arts and I have a bad temper.