yes it was definitely true for my form, the questions were easier than both uworld and the practice nbmes. however the nbmes had good predictive value scorewise. i felt that the nbmes were harder than uworld for me. all the best!
i would recommend 17 and 19, plus 2 newer ones, i took 16, 17, 19, 20, 21, and 23. they were all very predictive scorewise, but harder than my cbse form. my last nbme was 23, i scored a 202 7 days before. i think i had a 194 on 17 and 201 on 19.