"In a 20-page statement, SingTel
pointed out that average Internet speeds experienced by users vary
depending on how many are using the network at any given
time."
I thought they have always marketed themselves as providers of
"dedicated lines", whereas StarHub users need to share a single
green pipe?
"It said computer processing speed
and power supply would also affect Internet connection, as would
the type of operating system used."
The fengshui of the room would have a greater impact on the
connection speed than whatever power supply unit the computer is
using; maybe I should drop my idea of switching to M1 fibre next
year.
Indeed... I completely cannot understand why PSU will affect
internet connection 
I agree with ditzy's POV though...