http://dark.z5lcip4dafatwwa6hvyibizpzwycvwp67cjga3hzjhxhwvuyaqavxnid.onion/tech/462
How data is packet into tor cells, tor cells are packet into blobs and blobs into TCP packets depends on various parameters like server timings, size of buffers used to pass the data, Nagle algorithm and network latencies. When re-sending the query, the picture may differ slightly. However, from the point of view of statistics, a query sent to the same server will have a distinct picture.