Hi kate,
“Pushback” is another word for resilience and latex is a highly resilient material so it’s likely that what you are feeling is just the “feel” of latex (see post #136 here). Different materials can have very different properties (outside of just firmness levels) and some people will prefer the properties or “feel” of one material and others will prefer a completely different material. For some people it can certainly take some time to get used to the “feel” of latex.
Talalay is also a highly resilient material (more than Dunlop). There is more about how Talalay compares to Dunlop in general terms in post #7 here but the best way to know whether you would prefer it over Dunlop will be based on your own personal experience.
Phoenix