I believe he was saying warm up time was reduced from tube warm up periods to just the time it took to charge capacitors and such.
It wasn't due to capacitors at all though. It was the tubes being replaced by transistors and not having to wait for the filaments in the tubes to heat up anymore that got rid of the 'warm up'. The filament heat up time is what caused the 'warm up' period. He'd said the no warm up after solid state came out was due to capacitors, but it simply isn't so, it has nothing to do with capacitors.