yes, in the beggining, but when you have about 12 tracks and plus you did merging and punch in/out, that`s when it takes long time.
Try to make a song about 100-150 (4/4 measures), 14 tracks, then merge more stuff to each track do some punc in/out, do some copy- from and to, do velocity change, and make sure each track eats a lot of polyphony, than it won`t take 5-10 seconds.
that`s the thing i hate abour roland arrangers. For Example:In Korg Triton Studio as soon as you push stop you imidiatly can start recording another track.