Slow responsiveness using imap-idle-chael-adapter

I created an imap-idle-chael-adapter in my spring integration app to get mails from the server as fast as they are received. This is my configuration settings for the adapter:

<int:poller default="true" fixed-delay="50"/>

<util:properties id="javaMailProperties">
    <prop key="mail.imap.socketFactory.class">javax.net.ssl.SSLSocketFactory</prop>
    <prop key="mail.imap.socketFactory.fallback">false</prop>
    <prop key="mail.store.protocol">imaps</prop>
    <prop key="mail.debug">false</prop>
</util:properties>


<int-mail:imap-idle-chael-adapter id="imapAdapter"
                                    store-uri="${IMAP_URI}"
                                    chael="mailChael"
                                    auto-startup="true"
                                    should-delete-messages="false"
                                    should-mark-messages-as-read="true"
                                    java-mail-properties="javaMailProperties"/>

<int:chael id="mailChael">
    <int:queue />
</int:chael>

<bean id="mailTransformer" class="com.rafboard.integration.transformer.InboundMailTransformer" />

<int:transformer id="inboundMailTransformer" input-chael="mailChael" 
                 ref="mailTransformer" method="transform" output-chael="dataOutChael"/>

Everything seems to work right but in my logs I can see that there is no push notifications, the mail received is being pulled from the server every two minutes approximately.

2016-08-07 19:12:08.202 INFO 3 --- [ask-scheduler-4] o.s.integration.mail.ImapMailReceiver : attempting to receive mail from folder [INBOX]

2016-08-07 19:14:10.933 INFO 3 --- [ask-scheduler-9] o.s.integration.mail.ImapMailReceiver : attempting to receive mail from folder [INBOX]

2016-08-07 19:16:13.621 INFO 3 --- [ask-scheduler-8] o.s.integration.mail.ImapMailReceiver : attempting to receive mail from folder [INBOX]

Is there a way to speed up this? I thought ImapIdleChaelAdapter should received notification directly from mail server as soon as a mail is received but this is not like is behaving in my case.

PD: Mail server used is gmail.