Not sure about WSVN or WHDH, but you could be right. I think he used to be on WXII in Winston-Salem and WSAZ in Huntington, and at last check was also the voice of WAVY-10 in Norfolk.
With so many warm and fuzzy stories and franchise pieces that WSLS does in their first block of each newscast, his voice is not the right fit for that station. But then again, the overall quality of their topical and image promos has really gone downhill in the last couple of years...weak writing, poor shooting, cheap-looking edits, no-frills graphics. One night not too long ago, they actually ran a topical promo for their weekly "Viewers Voice" segment promoting some of the comments from viewers that would be featured that night!