i would suggest that if you are riding slower than the speed limit for the road, then other drivers will be getting pist off with you holding them up - especially at rush hour of if they've planned a journey and you make them take twice as long...and I dont blame them...so why not just pull in to the side for 2 minutes and let the back log pass you, then you can carry on your way safely and not have anyone making dangerous manouvres around you?
if you are going the speed limit and not holding anyone up - then do as the others say and take up your space...you have paid for the use of the road ( cyclists dont pay anything so I see why they shouldnt do the same)