If you're going to try to make a scientific argument, these blog posts are hardly credible. Let's take a look at some peer-reviewed research, shall we?
Acupuncture: theory, efficacy, and practice. Annals of Internal Medicine.
Ancient Chinese medicine and mechanistic evidence of acupuncture physiology. Pflügers Archiv: European Journal of Physiology.
Both of the cited articles (and the peer-reviewed research which they cite) point to the existence of qi. The latter article, in particular, provides one possible framework for understanding qi from a Western medical point of view. But that understanding is hardly necessary to employ qi. After all, we used aspirin for nearly 100 years before we figured out that it was an NSAID.
Quantitative evidence of the existence of qi, and its effects, exists.