.NET SDK GetReadStream truncates the data of a RawExtractionResult?

I use the .NET SDK, and followed the extraction example: "Tick History / Request Time and Sales for RICs" available in the API Examples sample application.The suggested way to unpack the results following the sample application is to get the ReadStream:

//Download the results
using (var response = ExtractionsContext.RawExtractionResultOperations.GetReadStream(result))
using (var stream = response.Stream)
using (var reader = newStreamReader(stream))
{
	var lineCount = 0;
	while (!reader.EndOfStream) 
	{
		Debug.WriteLine(reader.ReadLine());
		lineCount++;
	}
}   

It appears this method works fine only as long as the data extracted is small. As soon as I try to retrieve a few RICs the response.Stream seems to be truncated. Is that limited? I have run a couple of extractions, and by the Notes in the RawExtractionResults I should have received about 20,000 updates. However when I read the stream extracted like above it always seem to cap it at 5314 lines.

I assume I am hitting a limitation placed on the stream? Can you confirm please? If that is so, could you please:

a) point me to any documentation or sample code comments that states that such limitation exists,

b) point me to the alternative way to retrieve the extracted data.

Many thanks.