We are not sure which Smarty Plants Question and Answer you are referring to; when we went to Smarty Plants Questions Topics and searched on "chile pequin" (without the quotation marks), we found 21 previous Smarty Plants questions referring to Capsicum annuum (Chile pequin). When we followed that plant link to our page on the plant, we found that it is native to South Carolina.
Water Use: Low
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: clay, heavy clay, sandy loam
Conditions Comments: The Chile pequin is a much sought after perennial native hot pepper that is well behaved in the garden. It is an easy to grow favorite that the birds will also appreciate. Chile pequins will grow with sun or shade and respond to good care with more growth and fruits. The fruits are edilble and on the hot side as a seasoning. Beautiful when used in mass plantings."
It is always difficult to say why a plant does well in one spot and not in another. There are so many growing requirements that can go wrong (or right) including soil type and texture, watering frequency, sunlight available and care in planting. In this case you had a plant native to your area and apparently did nearly everything right. The others who had problems with their Chile pequins may have also done nearly everything right and maybe made one mistake or just had bad luck. We suggest that whatever you are doing, keep doing it.
Thank you for your comments.