LBS said creaking under torque is normal? On my last question I asked about a creaking/tick I was getting when I was stand pedaling on a climb.  

I took it to my LBS today and they said they had stripped all the crank and BB and re-greased it all and all is well.  

When I took it out that evening it clearly wasn't and was probably worse so obviously I took it back there today. 

They then told me that really the whole gear system is designed so that I don't need to stand pedal uphill.  My response was don't talk to me like a 5 year old and explained that I like the challenge of sprinting uphill.  Apparently according to the man who served me, theres not a lot I can do to prevent this noise when I'm stand pedaling?  My other bikes don't do it, but apparently a Trek 6300 does much to my confusion?

Can someone please tell me if this is normal? Or am I getting conned?  

He basically tried to make me feel a bit stupid as I'm still new to this and then decided that trying to sell me a Shimano Hollowtech 2 chainset including BB which would help strengthen the bottom of the bike and prevent the noise?

I'm a bit confused now to be honest and would like some unbiased expert advice from you guys.
First, to respond to the issue of your LBS -- you shouldn't be made to feel foolish or to feel obligated to purchase expensive replacement parts. The lack of attention and reassurance you're getting suggests that maybe you need to take your business elsewhere (which can be difficult if there are few local options).

Second, your creak/tick is not normal (and, as many have rightly pointed out, could come from many components which carry your pedaling force). While there are a number of components which have a tendency to creak or tick while remaining safe and functional (your BB for example), what your LBS should have checked for is any integrity issues with your frame (though, they may have done so and not mentioned it. Who knows?) 

Bicycle frames (Al, CroMo, Ti, Carbon Fiber...) can develop cracks in a number of places which, when stressed by pedaling aggressively, can generate creaks or ticks in time with pedaling forces. Some bike frames will live decades with cracks while others can--and do--fail catastrophically (i.e. your head tube tearing off...though, thankfully, this is infrequent).

I recommend that you take your bike to a different bike shop and ask them to investigate this potential problem (more info on frame inspections here). If they're good, they'll give you sound advice about repairs or replacement (avoid trashing your other shop, though. It's bad etiquette.) 

If the noise is a component, a good shop will solve the problem; a mediocre shop will replace every component one-by-one until the issue is solved (and a terrible shop will try to sell you a new bike!) Understand, however, that nuisance squeaks and creaks can be quite common--even for experienced cyclists.