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3....Floating copper on isolated SMPS PCB floats up to very high voltage during hipot test?

Hi,

Does any floating copper on a PCB float up to very high potential during the hipot test

from L+N to isolated output?

Eg we have a small bit of PCB which stands vertically in between our primary side NTC and electro cap in

order to stop the NTC burning the electro cap. It has a PTH pad which isn't connected to anything,

ie, its floating. Supposing the SMPS were hipot tested to 4kVrms from L+N  to isolated output. Will this pad possibly

go to a potential of 5.65kv or more, in relation to the pads and tracks surrounding it?