Confusion during service discovery with GoogleTalk client.

I send IQ like that to Gogole Talk client

<iq from="contact1@gmail.com/Talk.v10498F28475" id="ku6e51v3"
to="contact2@gmail.com" type="get">
  <query xmlns="http://jabber.org/protocol/disco#info"/>
</iq>

but response is

<iq to="contact1@gmail.com/Talk.v10498F28475"
from="contact2@gmail.com" id="ku6e51v3" type="result">
        <query xmlns="http://jabber.org/protocol/disco#info">
                <identity category="account" type="registered" name="Google Talk
User Account"/>
                <feature var="http://jabber.org/protocol/disco#info"/>
                <feature var="http://jabber.org/protocol/disco#items"/>
                <feature var="msgoffline"/>
        </query>
</iq>

But trying to query legitimate Google talk client! What I'm doing wrong?!
The same if contact logged under browser with video supported, what I'm looking for is this:

<iq from='contact2@gmail.com'
    id='ku6e51v3'
    to='contact1@gmail.com/Talk.v10498F28475'
    type='result'>
        <query xmlns='http://jabber.org/protocol/disco#info'>
                <feature var='urn:xmpp:jingle:1'/>
                <feature var='urn:xmpp:jingle:apps:rtp: