I do feel you have a valid point about the testimonial page. I don't think the picture is fake though, just badly cut around, but it is quite small, so they probably thought, well nobody is going to take our pic and zoom in to it and discuss it, Maybe the original had a curtain in the background or a strange pattern, like what you get from a Passport Photo booth, and so they thought it would look better to crop around it.
Their own photos?? Well they were probably done especially for promotional material and their own website. The other guy would have just probably emailed them a picture.
Anyway, going back to that testimonial, It is old and has been there a while, so I have an idea.
Put some more testimonials up. You have more customers now. I have read reviews, listened to your interviews, add some more!
I am sure there are lots of your customers who would love for you to have their own testimonial on your website.
Just an idea!
But I know you have lots of other things on your lists too

The image is 664x664, as is all the other's. 'Inspect Elements' is a wonderful tool

And testimonials mean nothing in the digital age....unless they come from well-known and well-respected members of a community.
After all, why should you believe what
I say? ((This is why I supported my case with a screenshot instead of just words))
...In fact, how do you even know
I (when talking about a message post on a website; not a forum) actually exists.
Dan Johnson is a 47 year old white male with brown eyes and dark brown hair. He currently lives in California up near Ferndale.
Problem is...he never existed. I made him up when I was under 18 to spoof the age check on various sites; from email to forums.
I can probably rattle off about 20 other names and personas that I can make up that sound legit (ie no John Smith or Jane Doe).