well it depends on which way you choose to DEFINE the words. Christian music to me is just music about Jesus (I'm thinking old bluegrass ballads or negro spirituals or some good rompin' stompin' heavenly highways) but within the last 10 years or so Christian music has become its own genre. Basically they have a watered down version of whatever's popular with lyrics that replace the themes of sex and alcohol with loving Jesus and having the joy of the Lord. Its disgusting really.
I've always figgered that if someone went to church they were looking for something DIFFERENT than what the world could offer them.... not a suckier version of what they can get on the radio.
'yuppie christians' as i like to call them seem to have this idea that if they can convinvce lost people that they're cool too they'll start coming to church (never mind the condition of thier SOULS just so long as they're down there shakin' it for Jesus 
)
There is some genuinely good Gospel music out there though but it usually falls under the southern gospel style (which has become marketed more nowadays but most of what you'll hear isnt the real thing), or bluegrass gospel.
Southern Gospel music kind of cultivated from bluegrass and spirituals. Its played mainly in 6/8 rythym and is usually sung in four part harmony. It can use any kind of instrument but features mainly piano and organ. The songs follow a basic 1-2-1-3-1 pattern but use alot of seventh chords and ocassionally step out of the order with the fourth and fifth chords
Bluegrass Gospel is basically bluegrass but its sung in harmony. usually has mainly stringed instruments.
Spirituals were developed by african american slaves and usually held hidden messages. the harmony and patterns they used were really amazing considering they had no kind of musical education. In fact it would probly be an interesting thing to look up theres a lot of history there
I would reccomend looking up sacred harp singing too and do some reading on it, its really impressive
