Nonwovens and articles containing submicron fibers

A nonwoven web product comprising at least one fibrous web comprising sub-micron fibers which comprise a polyolefin polymer, wherein the sub-micron fibers comprise a fibrillated polyolefin polymer melt film product obtained from a system at a polymer throughput of more than 1 gram per minute per orifice and have a standard deviation of fiber diameter distribution that is less than 0.5 micron, the fibrous web having a shot amount below an average of 10 shot particles per square-millimeter and no amount of web pinhole shot-created defects as determined at 10× magnification, wherein the shot comprises discrete polymer mass in spherical, ellipsoidal, or combined shapes thereof with a largest dimension ranging from 10 microns to 500 microns, and the fibrous web has a mean pore diameter of less than about 15 microns.