Ray Parker argued that, regarding stress-timing and rhythm, we have tended to throw the baby out with the bathwater. The notion that natural spoken English has a regular rhythm, he says, has been discredited by the research, but our response has been to abandon both that, and any attention to stress-timing.
Mark: Great pronunciation event at the weekend. Adrian Underhill shared insights in how sounds are articulated and relate to one another (see his blog on the phonemic chart here).