I built a entire website essentially built around this - http://www.everydaycarry.com - its been crazy seeing something that started off as a niche hobby turning into a business
I thought of your site as soon as I saw this, though, tbh, I don't think of it is a site. I know it from Twitter and somehow it is weird to me to think of it as a site. I can't quite put my finger on why that is.
The site is ranked in the Alexa top 10,000 in the US - I'd wager that DanBlake knows what he's doing and probably has the site dialed in for his target audience & device already.
Did you check the claim yourself? Or did you just feel the need to brown-nose for no reason? Not sure, but if you take the time to check (takes less time than typing your comment, or searching the Alexa DB), you'll see the front page for the site is just shy of 7MB, so I'd agree with the comment that it could do with being optimised better for mobile.
"Alexa Traffic Rank" browser extension shows the ranking for every site you visit, checking is a course of habit. My point was simply that the site is pretty darned popular, and as OP said, it's a business. A comment like "The images are too high res for mobile. It loads too slow." sounds more like jealous nit picking than anything else