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...It's mostly the "budget" Canon lenses that have cheaper AF motors that don't have full time manual focus available.
FWIW, the following currently listed Canon zoom lenses don't have AF + manual, or FT-M...
EFS 18-55 f3.5-5.6
EF 28-80 f3.5-5.6 II
EF 28-80 f3.5-5.6 V USM
EF 28-90 f4.0-5.6 II
EF 28-105 f4-5.6 USM
EF 28-105 f4-5.6
EF 28-200 f3.5-5.6
EF 28-200 f3.5-5.6 USM
EF 28-300 f3.5-5.6 L IS USM
EF 35-80 f4-5.6 III
EF 55-200 f4.5-5.6 II USM
EF-S 55-200 f4-5.6 IS
EF 70-300 f4-5.6 III
EF 70-300 f4.5-5.6 DO IS USM
EF 70-300 f4-5.6 III USM
EF 75-300 f4-5.6 IS USM
EF 80-200 f4.5-5.6 II
EF 90-300 f4.5-5.6 USM
EF 90-300 f4.5-5.6
...whereas all the Oly-Zuikos do. 
FTR, there are at least two lenses on that list that DO have FTM - the only two that aren't budget lenses.
According to Canon's website, none in the list have FTM, except the two I assume you refer to as not being budget lenses - the EF 28-300 f3.5-5.6 L IS USM, and the EF 70-300 f4.5-5.6 DO IS USM which have suggested retail prices of £2050 and £1050 respectively. Canon's website lists the FTM in a different place for these and I missed it - sorry. However, the rest, budget or not...
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Re: Olympus's innovative AF + manual mode