actually, I think glass reflection in the first image isn't fully wrong. that's just not believable enough for us, that's it.. but could be physically correct I guess.
distortion in flat glossy object's reflection is always be a good point to help our scene achieve a good photorealistic result but mostly it isn't acceptable in clients perspective. what a funny fact :D
but in flat glass material specially in architectural glasses has a kind of unique distorted reflection / nearly flat bumped surface that is really really hard for me to setup a believable result as it should. I give up for this
and another point, that kind of reflection always looks okay (flat enough) when we look at it in near distance, but it will comes with highly distorted or bumped in far away view.
many of experienced users here will probably has more in depth explanation about what I mean.
