Nit-picking time:

"it gives you the delay in mS."

That should be "ms" - a lowercase 's'

An uppercase 'S' is the symbol for "Siemens" - the SI unit of Conductance.

Uppercase is only used for units named after people; eg, Watt, Ohm, Ampere, Volta.
All other symbols are lowercase; eg, second, metre, kilogramme.

http://www.npl.co.uk/npl/refer...tions.html
http://physics.nist.gov/cuu/Units/rules.html