I'm really surprised nobody has really covered this yet. All the reviews I've read don't even seem to mention it, but the quietness of the speaker is one of the things I've always wished was better on the iPhone 4/4S.
people did talk about this when the 4S got released, it has a much higher and improved speaker than the iPhone 4, that's why I was asking about the 5
Whenever I put the volume on loud on my phone, it has buzz to it. Not sure if this is normal, but it's annoying if I want to hold the phone.
The 5 sounds better! When listening to music theres no distortion and it seems to have a better low response.
It depends on the degree. All speakers work by way of vibrations so it would be odd if you didn't feel the vibrations, particularly at high volume. That being said, I just had my iP5 swapped out because its speaker was excessively buzzy/tizzy/distorted (call it what you will). Take that with a grain of salt, however, I'm an audiophile geek and things bug me to distraction when it comes to audio that wouldn't bother anyone else, and 9 out of 10 people wouldn't have noticed any appreciable difference between my phone and any other iP5. The genius agent did hear the difference, but he clearly thought, and I readily admitted, that I was being very nit-picky about it. In my defense, however, unlike with the scuffs, which I do find people to be over-reacting about, this wasn't one of those things that would happen to my phone anyway over time as normal wear and tear. My replacement phone is noticeably better (to me).
With the caveat that I'm an audio-idiot savant, every iP5 phone I've listened to distorts like crazy at anything above 2/3rds volume and much more so at full volume than the iP4s. That being said, the iP5 plays much louder at full volume than the iP4s, which they seem to have accomplished at the expense of some sound fidelity.