Specific examples are, with result of dig AAAA
Would not load at all:
msn.com

; <<>> DiG 9.4.1-P1 <<>> AAAA msn.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20989
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;msn.com.                       IN      AAAA

;; AUTHORITY SECTION:
msn.com.                10451   IN      SOA     ns1.msft.net. msnhst.microsoft.com. 2007110104 1800 900 2419200 900

;; Query time: 57 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Nov  2 12:20:11 2007
;; MSG SIZE  rcvd: 90

Loaded intermittently:
google.com

;; Warning: Message parser reports malformed message packet.

; <<>> DiG 9.4.1-P1 <<>> AAAA google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19881
;; flags: qr rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;google.com.                    IN      AAAA

;; Query time: 48 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Nov  2 12:02:47 2007
;; MSG SIZE  rcvd: 28

or sometimes:

; <<>> DiG 9.4.1-P1 <<>> AAAA google.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10137
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;google.com.                    IN      AAAA

;; AUTHORITY SECTION:
google.com.             300     IN      SOA     ns1.google.com. dns-admin.google.com. 2007103100 7200 1800 1209600 300

;; Query time: 69 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Nov  2 12:20:28 2007
;; MSG SIZE  rcvd: 78


After long delays:
qwest.com


; <<>> DiG 9.4.1-P1 <<>> AAAA qwest.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 640
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;qwest.com.                     IN      AAAA

;; AUTHORITY SECTION:
qwest.com.              1023    IN      SOA     dca-ans-01.inet.qwest.net. dns-admin.qwestip.net. 2007103000 10800 3600 604800 3600

;; Query time: 54 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Nov  2 12:00:52 2007
;; MSG SIZE  rcvd: 106


Instantly, except for off-site resources.
userfriendly.org

; <<>> DiG 9.4.1-P1 <<>> AAAA userfriendly.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60127
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;userfriendly.org.              IN      AAAA

;; AUTHORITY SECTION:
userfriendly.org.       3600    IN      SOA     ns1.r4l.com. support.r4l.com. 2006101001 3600 1800 604800 3600

;; Query time: 126 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Fri Nov  2 11:59:25 2007
;; MSG SIZE  rcvd: 89