Jetpack debug

I am having problems with Jetpack – extremely high cpu usage once its connected to wordpress.com.
I’ve started my investigation from xmlrpc checks.
https://jetpack.me/support/debug/ – reports that xmlrpc is not available/unreachable on my site,
however I can perfectly reach it using curl, from different hosts:
`> GET /xmlrpc.php HTTP/1.1
> User-Agent: curl/7.40.0
> Host: blah-blah.com
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: nginx/1.4.6
< Date: Fri, 23 Jan 2015 14:08:09 GMT
< Content-Type: text/plain
< Content-Length: 42
< Connection: keep-alive
< Vary: Accept-Encoding
< X-Powered-By: PHP/5.4.26
< X-Cacheable: YES
< X-Varnish: 241639724
< Age: 0
< Via: 1.1 varnish
< X-Cache: MISS

And its properly functioning:
> GET /xmlrpc.php?rsd HTTP/1.1
> User-Agent: curl/7.40.0
> Host: blah-blah.com
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: nginx/1.4.6
< Date: Fri, 23 Jan 2015 14:17:33 GMT
< Content-Type: text/xml; charset=UTF-8
< Content-Length: 758
< Connection: keep-alive
< Vary: Accept-Encoding
< X-Powered-By: PHP/5.4.26
< X-Cacheable: YES
< X-Varnish: 241641903
< Age: 0
< Via: 1.1 varnish
< X-Cache: MISS
<

<?xml version=”1.0″ encoding=”UTF-8″?><rsd version=”1.0″ xmlns=”https://archipelago.phrasewise.com/rsd”&gt;
<service>
<engineName>WordPress</engineName>
<engineLink>https://www.ads-software.com/</engineLink&gt;
<homePageLink>https://www.blah-blah.com</homePageLink&gt;
<apis>
<api name=”WordPress” blogID=”1″ preferred=”true” apiLink=”https://www.blah-blah.com/xmlrpc.php&#8221; />
<api name=”Movable Type” blogID=”1″ preferred=”false” apiLink=”https://www.blah-blah.com/xmlrpc.php&#8221; />
<api name=”MetaWeblog” blogID=”1″ preferred=”false” apiLink=”https://www.blah-blah.com/xmlrpc.php&#8221; />
<api name=”Blogger” blogID=”1″ preferred=”false” apiLink=”https://www.blah-blah.com/xmlrpc.php&#8221; />
</apis>
</service>
</rsd>

I dont have any specific per host filtering.

https://www.ads-software.com/plugins/jetpack/