Its 'shallow', not 'narrow' ... DOF as the name implies is 'depth' how far into a picture is an object in focus. Not how far away from the centre of a view that its in focus.
Some picts of focusing off-centre and on-centre for comparison might make a better point.
Generally P&S can take pretty good shallow DOF pictures but only at Macro level. once you get big objects, even with a f2.8 aperture, its quite hopeless unless its some very brightly conditions. I tried with my prosumer camera, never could get it to work well with objects bigger than a pail!
my bad. it shld be narrow. with my current cam, need to get upclose and personal to get a good shallow DOF. would using a tele converter make any diff or shld i just get a proper dslr instead?