Earlier quoted context omitted.
Beyond the things you point out, my biggest point of skepticism on Theranos is its business and the potential value of it. Lab Corp is worth $11 billion. With $6 billion in sales (and having generated ~$1.6 billion in profit over the last three years). The market Theranos is tackling is not as huge as some people apparently would like to think. Lab Corp is a monster in the field, and they're merely doing $11 billion.…
Abaxis (manufacturers of the "Piccolo" systems, which seem to be lab-on-disc based and offer point-of-care operation) are an interesting company to compare to Theranos. They seem to be able to perform small panels of assays (up to 14) on 100 µL samples [1] obtained by venipuncture.[2] They are valued at $880M, and had ~ $200M revenue and $27M profit in the last financial year. http://www.abaxis.com/about_us/history.h…
If they were in startup world those numbers would probably make them over $1BN in valuation.