Simple answer, NO!
Being a master or slave does not affect performance.
DVDs normally want to be setup as masters, or the autostart function will not work. Dont know about new drives, but my toshiba M1212 will not play DVD disks, if it is not the master.
Just in case you want to copy directly from dvd to cd-rw, it would be ideal if they would be in different ide channels. Otherwise it is safer to make an image to your hdd before copying to cd. Poor IDE cannot perform read and write operations simultaneously like scsi.