Misconfig, I know exactly how you feel, I gain very slowly as well. The lifts you're doing can definitely gain you some strength and a bit of mass. Your first 12 weeks the gains you'll be making will be primarily from synaptic adaptation(neurological system adapting to being under load and allowing the muscles to fire when necessary) and those gains are always great. I'm still making the same gains myself actually.
Just be ready to alter your workout so you don't plateau as easily in the future. I change my routines every 3-5 weeks and it works out pretty well for me. Now as far as diet goes man, if you wanna gain 3,500 is a maintenance goal. lol If you wanna gain then up your intake to 5,000. Eat a really good breakfast EVERYDAY, eat your normal stuff you like, then eat a cup of cottage cheese before bed everynight.
Awesome Misconfig, just don't forget your fats. 80/20/20 is normally a healthy baseline, 80% Carbs/20 Fats/20 Protein.
I don't worry about doing it for lean mass because I regularly do cardio conditioning and burn some cals so I hover around 6-8% body fat everyday.
Today a question was posed to me that was interesting. "What type of strength isn't truly functional?" Ultimately I couldn't think of any, because any amount of strength you gain will help you overall.
I agree with Rick.
From my limited time working the land, these are the things you'll want to be good at.
1) Carrying heavy stuff for long distance or for a long time.
2) Shoveling, chopping, lifting, swinging, scraping, pushing, pulling various items animals etc.
3) Doing the above as long as the sun shines.
There's not much that requires a huge feat of strength, just lots and lots of little feats for a long long time.