It's very much down to the individual - I know of a few people who refuse to read anything that is classed as a serial, because the overall word length puts them off. And yet, one can have a serial broken up into quite small digestible chunks of 1,000 words or so for each part.
Personally, I prefer to read engaging stories that are 2-3,000 words as opposed to those that are 6,000 and upwards. A word count of 10,000 for one story or part of a serial can be a bit offputting unless it's written by an author I like, or I am armed with a large glass of single malt to aid my concentration ....
