Michael,
They are right, of course. It is a combination of speaker behaviour, room acoustics and T/T+phonostage attributes. Try Martin Logan electrostats at varying degrees of tilt, or even alter the arrangement of the soft furnishings along with your listening position and you will see/hear what I mean.
Personally, I'm not a room acoustics purist so I fully enjoy wraparound sound featuring tall images which can even appear standing right next to the listener's chair at full height.
A good example of this was a well known female artist who was singing front and centre while her other "selves" were harmonising/rapping in the L+R channels. With a particular turntable (an LP12), rather than residing at the loudspeakers, her other selves appeared standing on either side of my listening chair - 6 feet tall and so real I could touch them. (Try this trick with a CD and you'll be out of luck... ;)
Some turntables accentuate the vividness and reality of these "phase effects", effectively causing sounds to appear from the rear corners of the room. :)
Again it is very much recording dependent.
It is a fun hobby :)
Enjoy.
All the best,