So it's receptiongate this year, there was me thinking it'd be the screens like usual.
Do people seriously think Apple would release a phone with an antenna problem after the iPhone 4? Knowing how they'd be excoriated in the press about it? Come on... My bet is this is either a software / carrier settings issue, is caused by people trying to do a speed test while their phone is doing other stuff e.g. downloading all their iCloud data after setting it up (which eats a lot of bandwidth that the speed test app has to share), the bandwagon effect or confirmation bias (or a combination of the two). I notice a marked lack of any field test mode signal strength data...