Do the Duende Native Plug ins plug-ins have latency?

This depends on the plug-in:

Channel                   0 samples
Bus Compressor      0 samples
Drumstrip            182 samples @ fs=44.1kHz.
                           199 samples @ fs=48, 88.2 & 96kHz.
Vocalstrip           288 samples
X-Comp                 0 samples
X-Eq                       0 samples
X-Verb                   0 samples

Please note that most DAWs will compensate for these latencies when mixing.