Don't sweat it, that's the only review I've seen that said it was slippery - and I've seen a lot. Aside from The Verge, I saw the feel mentioned 3-4 times and all said it was very comfortable to hold and much grippier than the 5/5S.
Hope that I get it before mid October. Hope it's all that I've dreamed of having a larger screen iPhone. Last but not least hope this phone can satisfy my smartphone needs and I will stop changing phones so often.
I went to the store yesterday because I was curious to see the phone in person. It is a big and beautiful smartphone. I am really glad that I ordered one. I saw the one in gold and it was nice looking, but I'm glad that I got the space grey. It is going to look sweet.