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"I have not watermarked any of my images since both Google and Bing have been downgrading such images..."
Good heavens I put some helpful info out there for people who are wondering how long indexing and ranking is currently taking for a new site and I get grief!
...without details your info is not really helpful
Both Google and Bing removed many watermarked images in my niche, and others I have been informed, earlier this year, they both did it very quietly. Subsequently I tested re-introducing some non-watermarked images and those images regained their former rankings so I then replaced all the watermarked images on specific sites, not all sites, and nearly all those images have returned to the top and our traffic has increased substantially.
To you maybe but I found it helpful so thanks RedBar. I launched a site a few months back with around 20 pages of good info that now ranks reasonably well but it must have taken 6 weeks to get indexed (it was spidered very quickly). I still don't really know why tbhbut it's good to know that's not the norm.