CSS state sync questions

I learned from cisco doc that the CSS stat are exchanged in real time.
" For new flows, CSSs exchange flow states in real time over the ISC links. For existing flows, CSSs exchange flow states at boot-up time and at VIP redundancy failover.
I"
http://www.cisco.com/en/US/partner/products/hw/contnetw/ps792/products_configuration_guide_chapter09186a00801ef2a1.html
Does this mean that once a "flow" is created in a primary box, the state information will be replicated to the backup one? Are there any delay in the state replication? Is there any routine state database sync in addition to the real time replication?

as mentioned in the doc, when the flow is created on the active box, the flow info is immediately forwarded to the standby device.
Full database synchronisation will only occurs after failover of one of the two devices.
Regards,
Gilles.

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