I'm skeptical. There are too many unsupported claims in this article. Off the top of my head:

- Assumes the Chinese put the backdoor in. There are plenty of others interested in backdoors. - Assumes the designing company doesn't do any detailed production product checks. Not likely since this is a many, many billion dollar business. - Claims a systemic problem but only notes one chip. That one FPGA could just have a design flaw. Need more details on the others. - At the end it claims an investigation over ten years but the fab world has greatly changed over ten years. Many micro controller companies actually own their Chinese fabs now.

As a side note, if you discover something like this, don't assume you found something you weren't meant to find. You're discovery may just have made you found.