[syslog-ng] keep_timestamp() and use_time_recvd() equivalent?

Q: Is option keep_timestamp(no) reasonably equivalent to use_time_recvd(yes)? Background: We recently upgraded from OSE v2.1 to v3.1.2. This went well, but our global options include the deprecated use_time_recvd(). We see this advisory on startup:

Your configuration file uses an obsoleted keyword, please update your configuration; keyword='use_time_recvd', change='Use R_ or S_ prefixed macros in templates'

We don't modify the default templates, so adding these for the first time wouldn't be my first choice. Instead, can I simply use global option keep_timestamp(no) as a replacement? I looked around for advice, but didn't see anything obvious. Thanks in advance! -cheers, CSB