how does peoplesoft data get into ses?

I thought that I understood at a gigh level how PeopleSoft data is processed over to SES through teh PTSF_GENFEED app engine. 

My understanding is:

1) PTSF_GENFEED runs connected queries to mine the data in the PeopleSoft DB

2) the data is sent to the PTSF_SES_FEEDS IB queue

3) IB sends teh data to the SES instance

4) SES instance loads the data into its DB ready to be searched

I have been having issues with one or two PTSF_SES_FEEDS queue messages timing out.  Product Support are referring me to MOS Doc ID 1988711.1 which states These message do not need to go to DONE status, as the feeds processing API picks up the information for the search directly from the message instance queue tables, rather than via a handler insertion into application tables.