Today, it took almost 6 hours for new Contacts that we added to Salesforce to synch to Marketo. Ususally this takes about 5 minutes - 10 to 20 on a bad day. I submitted a support case and was told that "if the sync was not forced (it does not occur all the time) and if it was forced, then if several batch campaigns were running that can delay the sync. We had no large batch campaigns running at that time and I have never heard that you have to force a synch from SFDC when a new Contact record is added. Has anyone else experienced this problem or can point me at a help article about having to force a synch after adding a new Contact in SFDC?