hmmmm - a look in the log reveals this:
2015-10-13 22:20:02,206::INFO::[downloader:423]
1@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:08,606::INFO::[downloader:423]
2@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:14,492::INFO::[downloader:423]
3@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:18,838::INFO::[downloader:423]
4@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:23,004::INFO::[downloader:423]
5@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:27,819::INFO::[downloader:423]
6@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:32,446::INFO::[downloader:423]
7@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:36,871::INFO::[downloader:423]
8@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:41,711::INFO::[downloader:423]
9@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:47,146::INFO::[downloader:423]
10@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:52,334::INFO::[downloader:423]
11@ssl.astraweb.com: Initiating connection
2015-10-13 22:20:57,069::INFO::[downloader:423]
12@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:01,972::INFO::[downloader:423]
13@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:06,643::INFO::[downloader:423]
14@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:12,012::INFO::[downloader:423]
15@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:16,627::INFO::[downloader:423]
16@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:21,492::INFO::[downloader:423]
17@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:27,360::INFO::[downloader:423]
18@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:31,881::INFO::[downloader:423]
19@ssl.astraweb.com: Initiating connection
2015-10-13 22:21:36,308::INFO::[downloader:423]
20@ssl.astraweb.com: Initiating connection
4 seconds between each connection - is this something new in .0.8?