Do local Seasons matter in a Global marketplace?

Here in Canada and the U.S., the summer holiday season is fast approaching.  Traditionally, many core b2b markets experience a lull in sales as final decisions on some pending orders are shelved, till key decision makers return from their annual family holidays.  This trend is also played out in Australia, South Africa and Brasil during their summer holiday season around Christmas.
Unlike many retail or b2c markets where seasons play a critical role in driving demand for products, the trend globally, has been to shift focus from lull areas to more active regions in order to fill sales pipelines.  While this stragem has merit their is still the underlying need to think locally to be a world class marketing organisation.  The many multinational US/ China companies for example have operations or facilities in Africa, and South America.  The direct needs of which may take place during the lull at headquarters but the busy periods in their regions.  As such a more balanced seasonally focused approach is warranted, one in which the need for senior executive input from head office is garnered  when possible allowing the operational group in the Southern Hemisphere to take action, order your products/services when they need them.  Done well the global seasonless approach will work. Done poorly it can spell long delays due to seasonal lulls.