Without reading the article, the short answer is yes. If you mean "tone" in the way the common person does, you mean building muscle and losing fat. By building muscle, you will probably increase strength. And various weight loss techniques may also increase strength, although I understand this to be ore likely in beginners than advanced trainees.
If, however, you mean the scientific meaning of muscle tone, which is about the neural activity in the muscle, then muscle tone is actually MORE about strength, and increasing muscle tone would indicate an increase in strength.