That's a pretty wild assertion: Let's see here.
2002:
11 April - A truck explodes near El Ghriba synagogue on the southern Tunisian island of Djerba, killing 14 Germans, five Tunisians and a Frenchman. Al-Qaida claims responsibility.
8 May - An assailant in a car kills himself, 11 French navy experts and three Pakistanis outside the Sheraton Hotel in Karachi, Pakistan. A Pakistani court later finds three members of the banned Islamic group Harkat-ul Muhajideen guilty of planning the attack.
14 June - A car bomb outside the US consulate in Karachi kills at least 11 people and wounds 45. Four members of Harkat-ul Muhajideen are later found guilty.
12 Oct - Bombs explode in Kuta Beach nightclub district of Bali in Indonesia, killing 202 people and wounding hundreds. A third bomb explodes near the US consulate in Sanur near Kuta, without causing casualties. Members of the banned Islamic group Jemaah Islamiyah, linked to al-Qaida, admit responsibility.
28 Nov - At least 15 people are killed in car bomb attack on hotel frequented by Israeli tourists in Kenyan port of Mombasa while two missiles miss Israeli airliner taking off from the city. Al-Qaida admits responsibility.
2003:
12 May - Suicide bombers in vehicles shoot their way into housing compounds for expatriates in Saudi capital of Riyadh. Some 35 people, including nine Americans, are killed. US Secretary of State Colin Powell blames al-Qaida.
May 16 - Bombers set off at least five explosions in Casablanca, Morocco, which hit a Spanish restaurant, a five-star hotel and a Jewish community centre, killing 45 people, including 12 bombers, and wounding about 60. Members of the Morrocan organisation the Salafist Jihad, which has indirect links to al-Qaida, are found guilty.
7 June - A suicide car bomber blows up a bus full of German peacekeepers east of the Afghan capital Kabul, killing four and wounding 31. An Afghan civilian and the bomber are also killed. German Defence Minister Peter Struck blames al-Qaida.
5 Aug - A huge bomb kills 10 people and wounds 150 when it rips through the Marriott Hotel in the Indonesian capital, Jakarta. The militant group Jemaah Islamiyah is blamed by Indonesian Defence Minister Matori Abdul Djalil for the blast.
19 Aug - The Brigades of the Martyr Abu Hafz al-Masri, said to be an al-Qaida division, claim responsibility for a massive truck bomb which devastates the UN headquarters in Baghdad. Twenty two people are killed, including Sergio Vieira de Mello, the top UN envoy to Iraq.
15 Nov - Two car bombs explode outside synagogues in central Istanbul, killing up to 25 people. An Arabic newspaper says the Brigades of the Martyr Abu Hafz al-Masri claim responsibility.
20 Nov - Explosions hit the HSBC bank and the British consulate in Istanbul, killing at least 27 people, according to television reports. A caller to Anatolian news agency claims responsibility on behalf of al-Qaida and a Turkish Islamist group.
I guess it's been all defeat for AQ unless your one of the hundreds of innocent people killed by them in the past two years. Certainly we have prevented dozens of such attacks in the past to years, and GWB is doing a fantastic job prosecuting the WOT but to say AQ is defeated is a stretch to say the least.