John Jones, nice man that he is (and I have actually met him in person at a bee meeting), gave me some of the purple nitrile gloves and I like them. I bought the blue ones from Gempler and have really loved them. They allow me more dexterity than those clumsy leather gloves and they are comfortable to wear. However, I have been stung through the blue gloves - not often but I am slow and gentle with my bees. The only time I was stung through them was this hot hive - a swarm hive - and they attack me everywhere, every time I open the hive.
I have not noticed any more bee activity on my hands than with leather gloves and if the bees seem too interested in my hands, it is both easier to notice and easier to get them to go somewhere else.
As was said in the above post, when I was stung, the glove did not rip as it is supposed to when penetrated.
I'm a fan of the nitrile glove - I like the purple ones John gave me. They seem the same to me as the blue ones, but they are a little large for me, so I can't say for sure about their effectiveness. I have not been stung through them yet.
Linda T in Atlanta, very happy in either blue or purple.