Just a quick random question that I can't seem to find an answer to. It's probably an old topic, but I recently loaded up and updated SC2 for some games. However I've noticed that its now "streaming data" during every single load before a match.
Is this streamed data what I assume it is and the game itself downloading content from Blizzard? (even for singleplayer and skirmish games).

If so I'm a little concerned as it seems to be 100mb+ per time - which fast adds up to GB of data which fast adds up to me using up my whole download limit.

So first what is the data streaming during loading and if it is downloading data what data is it and can I disable it without having to disconnect from the net (I've not tested but I assume it still runs without issue offline!)

I would assume it's map/asset updates and will stop when you have them all. This is how shooters used to share maps among the players too, hell UT2004 and UT even shared skins that you had loaded (whether you were using them or not).

See this is what I assumed, however 100mb per game seems rather excessive for updated content? Esp since most of it should be on the game disk/install info itself to begin with. I could understand if I were playing new maps or a new campaign.

I know that they did change to an active streaming setup for patches, but it seems odd that they'd essentially remake every core map/component of the game. I'll have to check next time and replay the same map again and see if it wants to still stream data.