The phrase "generally polite" is correct and usable in written English.
It can be used to describe a particular part of a sentence that is polite in a general or overall sense. Example: "I appreciate your request for more information and hope you understand that I am unable to provide it at this time. This is a generally polite way of saying 'no' without causing offense."
The Burmese, generally polite, leave civility at the gates.
One speaker after another took a seat to make what were generally polite points.
NJPAC, which sells tickets mostly through subscriptions, has a generally polite audience.
But few people interviewed here seemed to hate the troops, whom they described as generally polite.
DESPITE the crowding in the restaurant, the service is generally polite and welcoming.
The employees at the Boeing plant gave Mr. Bush a generally polite reception.
The blocked pathways already threatened to melt into a slushy fuck you in the afternoon sun, likely inspiring the generally polite-but-utilitarian pace and demeanor of the people I passed on my way up Mulberry Street.
Indeed, the tone of the meetings has generally remained polite, officials in both parties said, and Mr. Obama and Mr. Boehner have gone out of their way to praise each other publicly in an effort to preserve good will.
To get around this problem, I appointed a "minister of information," whose job it was to disseminate news, deflect queries and generally be polite when I didn't have the energy or inclination to be.
Apart from Lord Matthew Oakeshotttt, Liberal Democrats are generally too polite to mention the leader's poor ratings, which are indeed well below the territory that fashioned an ejector seat for William Hague, Iain Duncan Smith and Sir Menzies Campbell.
The same tone was deployed in the emails with Michel, when Wilkes repeatedly rebuffs Michel's requests for a meeting, joking that it would only be appropriate "when a Google search of 'Vince Cable'Newsews International' and 'Sky' doesn't turn anything up!" This tallies with his own description of himself as someone who "generally" prefers "polite repartee to melodramatic trollery".
