That's a totally different statement though. Model 3s are also only 53,000 of that, although that's still just under 2 years. But really, the number of deposits doesn't have much of anything to do with the actual demand. The number of cancellations and new deposits also makes it really hard to estimate what it actually is.
The bottom line though is that any reasonable observer will expect the Model 3 to keep a sustained demand at its price point. People really do like them despite what critics say.