The terms "natural deflation" and "deflation" come directly from Satoshi Nakamoto who used it on many occasions to describe Bitcoin's distribution. To write an article called "Stop Calling Bitcoin Deflationary" that does not mention it comes directly from Satoshi is highly suspicious.

"The fact that new coins are produced means the money supply increases by a planned amount, but this does not necessarily result in inflation. If the supply of money increases at the same rate that the number of people using it increases, prices remain stable. If it does not increase as fast as demand, there will be deflation and early holders of money will see its value increase." - Satoshi Nakamoto, November 8, 2008

"Yes, there will be natural deflation due to payment mistakes and lost data. Coin creation will eventually get slow enough that it is exceeded by natural deflation and we'll have net deflation" - Satoshi Nakamoto, December 13, 2009