The post didn't detail specifications, or even specifically name the HTC One Mini, but the intent was plainly to tease the upcoming device. Here's the text of that post -
"The HTC One, by many accounts, is the pinnacle of smartphone achievement. The beautiful metal design, powerful hardware, and innovative user experience pack a lot into a svelte package, making it hit with critics and consumers alike. This success has only boosted our passion to bring the One experience to as many people as possible.In that spirit, here’s an homage to little things that back a big punch.
Can you think of anything else that packs a big punch into a small package?"
The last sentence of the first paragraph is really the key here - wanting to "bring the One experience to as many people as possible." So you can probably assume the One Mini is going to be cheap[-ish] compared to the HTC One which is still pricier than most rival smartphones out there . HTC seems to imply it will pack a "big punch," though recent leaks have pointed to a fairly middle-of-the-road Snapdragon 400 dual-core chip, 1GB of RAM, and a 4.3" 720p display. Still, that's considerably better than the Galaxy S4 Mini, which is the primary device HTC will be trying to One-up here
What can we take from this blog post? Well, a One Mini announcement can't be far off now, so it's probably a safe bet that the [relatively] pint-sized One will drop in the coming weeks. AndroidAndMe