Hi, After 5 years spent with the same old Macbook Air because none of the new options where satisfying and/or affordable for their value, I decided to go ahead and buy a 2015 entry 13" MBP (with Yosemite 10.10.3 so). And am I crazy or is it pretty sluggish for a brand-new system with so-called faster PCIe and 8GB or higher-freq ram? Apps are taking a few second to open instead of quickly, when I scroll trough content you can clearly see the slug, it's no fluid as you would expect, and clicking on many options or buttons, in System Preference, is laggy too. I'm worried, that either I ended-up with a brand new deficient MBP or that the new MBP is just not as fast as I would've expected or experienced when I bought a Macbook Air 5 years ago to notice the power of SSD speed. Are there any tools to test and verify all of this?