When determining tyre pressures for race conditions, the race engineers would NOT have taken comfort into account at all. Speed is the ONLY consideration. A tyre will have an optimum grip at a specific pressure and that is all they would take into account. Incidentally, the optimum pressures for your tyres would probably be different to that of the tyres used in the 60s.
If the race engineers found that the wheel "bounced" at this optimum pressure, then the suspension would be tuned to eliminate that bounce. (On the other hand, if by "bounce" you mean that it rattles the driver's fillings out, then the race drivers would be expected to get better fillings /ubbthreads/images/graemlins/smile.gif )
Another point worth mentioning is that cold pressures are only a starting point when we are talking about the race track. The actual running temperatures can vary quite considerably from cold depending upon the conditions and characteristics of the track. It is not uncommon for example, for modern tyres to increase in pressure by 5psi under race condition relative to cold. Some race cars even have relief valves in the wheels to allow the tyers to get up to optimum PSI and no further.
On the road however, optimum grip can be placed a little lower in the priority scale so lower pressures are advised, especially if long term car and driver preservation is a consideration /ubbthreads/images/graemlins/smile.gif