On my DS1104Z, one channel, no input, 50 ns/div, dot mode, I get about 62,500 waveforms/second as measured on a scope. But, be careful - if I look over a long time span, I can see the DS1104Z has gaps in the trigger output pulse train. Thus, when I switch to a counter, I get about 52,500 waveforms/second because the gate time of the counter hits those gaps. If I turn the counter gate time down enough, I can get just about any reading I want. Whether the gaps are truly gaps in the processing, or whether the thing really is doing 62,500 consistently, I defer to the experts. However, I just wanted to point this out because it may explain why people are reporting numbers similar to both cases.