My Iphone 2G/3G never had issues with dropped calls and choppy reception at my house, no matter how I held them. The iphone4 does.
That's all the proof I need.
And I'm pretty sure the issue is not as bad on those other phones as it is on the iphone 4. If you really believe it is because Apple says so, then I don't think we'll ever agree. So, let's agree to disagree.
You probably don't have this issue, so I can understand your perspective, but I did have the issue and it was bad enough for me to return it. Consumer Reports not recommending it makes perfect sense to me.
People can read their full review and make their own decision.
It is an issue with ALL phones whether you like it or not. Your old phones DID have the issue, you probably didn't notice it. Here are other non-iPhone examples since you asked for proof.
* Samsung I9000 Galaxy S: http://www.youtube.com/watch?v=LROTHrTR92k
* HTC Evo Signal Attenuation: http://www.youtube.com/watch?v=2pj2YBYTbag
* Samsung Galaxy 1:http://www.youtube.com/watch?v=
* Samsung Galaxy 2:http://www.youtube.com/watch?v=oPCQdYtPihg
* Droid Incredible: http://www.youtube.com/watch?v=eaDE941PzQk
* Droid Incredible (With Network Extender in Room): http://www.youtube.com/watch?v=VpEQH9_A5jw&feature=related
* Nexus One: http://www.youtube.com/watch?v=qEIA_lMwqJA
* Nexus One vs. iPhone (start at 1:29): http://www.youtube.com/watch?v=NvMoV4_C4aA
* Nexus One: http://posterous.com/getfile/files.p...n_-_iPhone.m4v
* Nexus One (after Google's update to correct): http://www.youtube.com/watch?v=x2g5J4qPp54
* Nexus One: http://www.youtube.com/watch?v=deCkjeHYT-g
* Android G1: http://www.youtube.com/watch?v=3CDaxhjUs9M
* "Major signal degradation when Nexus One is picked up" (N1 Thread on On this Problem): http://www.google.com/support/forum/p/android/thread?tid=34ae2c179184c33e&hl=en