Web hooks slow to POST?

I’m new to using Web Hooks and it seems that the time to POST to the receiving service varies tremendously from seconds to multiple minutes. Last night it responded in seconds then later over 6 mins. Here are some example timings from the “particle subscribe mine” command. Is this variability “normal”?

{“name”:“photon-motion”,“data”:“my photon”,“ttl”:“60”,“published_at”:“2015-10-07T01:33:11.347Z”,“coreid”:“42002a000547343337------”}
{“name”:“hook-sent/photon-motion”,“data”:“undefined”,“ttl”:“60”,“published_at”:“2015-10-07T01:33:14.509Z”,“coreid”:"\u0000V,�\u0018"}
{“name”:“photon-motion”,“data”:“my photon”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:01.209Z”,“coreid”:“42002a000547343337------”}
{“name”:“hook-sent/photon-motion”,“data”:“undefined”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:02.090Z”,“coreid”:"\u0000V,�\u0019"}
{“name”:“photon-motion”,“data”:“my photon”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:12.757Z”,“coreid”:“42002a000547343337------”}
{“name”:“hook-sent/photon-motion”,“data”:“undefined”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:15.931Z”,“coreid”:"\u0000V,��"}
{“name”:“photon-motion”,“data”:“my photon”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:37.291Z”,“coreid”:“42002a000547343337------”}
{“name”:“hook-sent/photon-motion”,“data”:“undefined”,“ttl”:“60”,“published_at”:“2015-10-07T01:35:38.737Z”,“coreid”:"\u0000V,�("}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“9551cc32436a4b00858b10dfce184b36”}",“ttl”:“60”,“published_at”:“2015-10-07T01:36:28.088Z”,“coreid”:"\u0000V,��"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“c84fed4330295d172535e38676143c4f”}",“ttl”:“60”,“published_at”:“2015-10-07T01:37:01.355Z”,“coreid”:"\u0000V-\u0003�"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“7fd230200be5ed166ae8d7d00ef3a935”}",“ttl”:“60”,“published_at”:“2015-10-07T01:38:07.072Z”,“coreid”:"\u0000V-\u000b�"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“f46c93779a9f25c66382a8a9e5930f5f”}",“ttl”:“60”,“published_at”:“2015-10-07T01:38:30.215Z”,“coreid”:"\u0000V-\u000e�"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“b3c5a2c8f869f5265c1918338f845f64”}",“ttl”:“60”,“published_at”:“2015-10-07T01:39:40.449Z”,“coreid”:"\u0000V-\u0016�"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“c4e0a3d5997bd25b33b5caebfe89f75b”}",“ttl”:“60”,“published_at”:“2015-10-07T01:40:52.697Z”,“coreid”:"\u0000V-"\u0015"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“7ee072457d3510739b297fa7e17b681c”}",“ttl”:“60”,“published_at”:“2015-10-07T01:41:04.272Z”,“coreid”:"\u0000V-#�"}
{“name”:“hook-response/photon-motion/0”,“data”:"{“status”:1,“request”:“0955b429d6d48625be50f26711e8ae6d”}",“ttl”:“60”,“published_at”:“2015-10-07T01:41:20.054Z”,“coreid”:"\u0000V-&o"}

I noticed this issue last night while testing modification to an (almost) completed project.

I saw responses taking 30seconds or even more!