VERY POOR WIFI ON ALL APPLE PRODUCTS
I am very disappointed in the quality of the wireless NIC of all Apple devices at home, because of my business I have a enterprise class network based on cisco at home, including Aironet for WiFi (I mean, i can not get better hardware than enterprise class hardware), and all wireless devices including printers, Chromecast, android devices, computers with linux, with windows work perfect, but all Apple devices has a poor behavior with WIFI (two iPhone 5s, one apple tv 1080, and one ipod touch 4). Apple devices disconnects, have high ping times (sometimes over 2000ms) and no solution from Apple, it's frustrating that products like apple's that cost much have this embarassing quality in this point that is so important.
Please dont say, "be near to access point" or, "change your router", I am IT/Infrastructure architect and my wife electronic engineer (Both Cisco Pros), so the basic and advanced tests have been made.
If you search on google "iphone wifi problems" or "appletv wifi problems" you find many entries, same with ipad. Evidently something is wrong with your products, and "problems" is not that you sell in your corporate image.
Apple, please take the awareness and responsibility of this and solve the problem quickly, you could lose customers on a massive scale.
iPhone 5s, iOS 8.1