I recently did a mock WAIS-IV digit span test on
https://tools.timodenk.com/digit-span-test, and I was able to memorize up to 9 digits missing one at 7 digits and one at 9 digits, 8 digits backwards missing one at 6 digits and one at 8 digits, 8 digits ordered missing both at 8 digits. I think that my lack of academic success and respect from others is the result of having a poor memory.
I also did terribly on letter-number sequencing stopping at 6 letters/numbers. I took the human benchmark memory tests a couple of months ago and got 100 percentile on the sequence memory (score of 67), number memory (score of 20 with the use of mnemonics), verbal memory (556), chimp test (31), visual memory (20). Basically at the 100th percentile, yet I can't score that high on the WAIS-IV digit span tests.
I think that I would ace all of the other sections of the WAIS-IV with perfect scores in all of the subtests, but not in working memory. I would always forget what I just learned, and I would have to go reread the material over and over to have it stick to my memory, which is a waste of time.
